/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/termination-memory-linkedlists/cll_by_lseg_traverse-alloca.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 04:42:07,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 04:42:07,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 04:42:07,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 04:42:07,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 04:42:07,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 04:42:07,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 04:42:07,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 04:42:07,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 04:42:07,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 04:42:07,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 04:42:07,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 04:42:07,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 04:42:07,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 04:42:07,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 04:42:07,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 04:42:07,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 04:42:07,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 04:42:07,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 04:42:07,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 04:42:07,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 04:42:07,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 04:42:07,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 04:42:07,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 04:42:07,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 04:42:07,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 04:42:07,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 04:42:07,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 04:42:07,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 04:42:07,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 04:42:07,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 04:42:07,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 04:42:07,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 04:42:07,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 04:42:07,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 04:42:07,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 04:42:07,898 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 04:42:07,933 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 04:42:07,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 04:42:07,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 04:42:07,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 04:42:07,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 04:42:07,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 04:42:07,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 04:42:07,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 04:42:07,936 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 04:42:07,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 04:42:07,936 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 04:42:07,936 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 04:42:07,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 04:42:07,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 04:42:07,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 04:42:07,937 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 04:42:07,937 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 04:42:07,937 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 04:42:07,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 04:42:07,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 04:42:07,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 04:42:07,938 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 04:42:07,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 04:42:07,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 04:42:07,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 04:42:07,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:42:07,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 04:42:07,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 04:42:07,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 04:42:07,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 04:42:07,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 04:42:08,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 04:42:08,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 04:42:08,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 04:42:08,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 04:42:08,367 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 04:42:08,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-memory-linkedlists/cll_by_lseg_traverse-alloca.i [2022-10-16 04:42:08,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baec7bd4b/c647a764319e4db6a182731ab5646b70/FLAGfea8e61bd [2022-10-16 04:42:09,168 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 04:42:09,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-linkedlists/cll_by_lseg_traverse-alloca.i [2022-10-16 04:42:09,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baec7bd4b/c647a764319e4db6a182731ab5646b70/FLAGfea8e61bd [2022-10-16 04:42:09,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baec7bd4b/c647a764319e4db6a182731ab5646b70 [2022-10-16 04:42:09,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 04:42:09,391 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 04:42:09,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 04:42:09,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 04:42:09,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 04:42:09,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:09,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735c34e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09, skipping insertion in model container [2022-10-16 04:42:09,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:09,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 04:42:09,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 04:42:09,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:42:09,833 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 04:42:09,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:42:09,958 INFO L208 MainTranslator]: Completed translation [2022-10-16 04:42:09,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09 WrapperNode [2022-10-16 04:42:09,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 04:42:09,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 04:42:09,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 04:42:09,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 04:42:09,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,052 INFO L138 Inliner]: procedures = 115, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 36 [2022-10-16 04:42:10,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 04:42:10,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 04:42:10,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 04:42:10,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 04:42:10,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 04:42:10,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 04:42:10,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 04:42:10,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 04:42:10,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (1/1) ... [2022-10-16 04:42:10,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:42:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:10,130 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 04:42:10,155 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 04:42:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 04:42:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-16 04:42:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-16 04:42:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-16 04:42:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure new_lseg [2022-10-16 04:42:10,201 INFO L138 BoogieDeclarations]: Found implementation of procedure new_lseg [2022-10-16 04:42:10,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 04:42:10,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 04:42:10,292 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 04:42:10,294 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 04:42:10,628 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 04:42:10,636 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 04:42:10,636 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-16 04:42:10,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:42:10 BoogieIcfgContainer [2022-10-16 04:42:10,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 04:42:10,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 04:42:10,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 04:42:10,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 04:42:10,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 04:42:09" (1/3) ... [2022-10-16 04:42:10,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3859ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:42:10, skipping insertion in model container [2022-10-16 04:42:10,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:42:09" (2/3) ... [2022-10-16 04:42:10,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3859ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:42:10, skipping insertion in model container [2022-10-16 04:42:10,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:42:10" (3/3) ... [2022-10-16 04:42:10,649 INFO L112 eAbstractionObserver]: Analyzing ICFG cll_by_lseg_traverse-alloca.i [2022-10-16 04:42:10,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 04:42:10,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-10-16 04:42:10,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 04:42:10,744 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;@6df73daa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 04:42:10,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-10-16 04:42:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 04:42:10,758 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:10,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 04:42:10,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash 925634, now seen corresponding path program 1 times [2022-10-16 04:42:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:10,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100381758] [2022-10-16 04:42:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:10,960 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 04:42:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100381758] [2022-10-16 04:42:10,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100381758] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:10,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:10,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:42:10,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673255743] [2022-10-16 04:42:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:10,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:42:10,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:42:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:42:11,008 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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 04:42:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:11,068 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-10-16 04:42:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:42:11,075 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 04:42:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:11,084 INFO L225 Difference]: With dead ends: 35 [2022-10-16 04:42:11,085 INFO L226 Difference]: Without dead ends: 32 [2022-10-16 04:42:11,087 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 04:42:11,092 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:11,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:42:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-16 04:42:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-10-16 04:42:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-10-16 04:42:11,140 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 4 [2022-10-16 04:42:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:11,140 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-10-16 04:42:11,141 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 04:42:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-10-16 04:42:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 04:42:11,142 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:11,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 04:42:11,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 04:42:11,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2022-10-16 04:42:11,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:11,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839721598] [2022-10-16 04:42:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:11,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:11,214 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 04:42:11,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:11,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839721598] [2022-10-16 04:42:11,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839721598] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:11,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:11,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:42:11,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123025267] [2022-10-16 04:42:11,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:11,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:42:11,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:42:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:42:11,220 INFO L87 Difference]: Start difference. First operand 32 states and 34 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 04:42:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:11,256 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-10-16 04:42:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:42:11,256 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 04:42:11,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:11,258 INFO L225 Difference]: With dead ends: 31 [2022-10-16 04:42:11,258 INFO L226 Difference]: Without dead ends: 31 [2022-10-16 04:42:11,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:42:11,260 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:11,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:42:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-16 04:42:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-10-16 04:42:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-10-16 04:42:11,268 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 4 [2022-10-16 04:42:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:11,269 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-10-16 04:42:11,269 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 04:42:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-10-16 04:42:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 04:42:11,270 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:11,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 04:42:11,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 04:42:11,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:11,271 INFO L85 PathProgramCache]: Analyzing trace with hash 925670, now seen corresponding path program 1 times [2022-10-16 04:42:11,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:11,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200543110] [2022-10-16 04:42:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:11,380 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 04:42:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:11,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200543110] [2022-10-16 04:42:11,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200543110] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:11,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:11,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:42:11,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268919132] [2022-10-16 04:42:11,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:11,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:42:11,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:11,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:42:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:42:11,384 INFO L87 Difference]: Start difference. First operand 31 states and 33 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 04:42:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:11,415 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-10-16 04:42:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:42:11,416 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 04:42:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:11,417 INFO L225 Difference]: With dead ends: 30 [2022-10-16 04:42:11,417 INFO L226 Difference]: Without dead ends: 30 [2022-10-16 04:42:11,418 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 04:42:11,420 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:11,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:42:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-16 04:42:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-16 04:42:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-10-16 04:42:11,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2022-10-16 04:42:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:11,428 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-10-16 04:42:11,428 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 04:42:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-10-16 04:42:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 04:42:11,429 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:11,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:11,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 04:42:11,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting new_lsegErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:11,431 INFO L85 PathProgramCache]: Analyzing trace with hash 176962904, now seen corresponding path program 1 times [2022-10-16 04:42:11,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:11,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798544527] [2022-10-16 04:42:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:11,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:11,525 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 04:42:11,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:11,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798544527] [2022-10-16 04:42:11,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798544527] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:11,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:11,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:42:11,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087293022] [2022-10-16 04:42:11,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:11,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:42:11,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:42:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:42:11,529 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:11,571 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-10-16 04:42:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:42:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 04:42:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:11,575 INFO L225 Difference]: With dead ends: 31 [2022-10-16 04:42:11,575 INFO L226 Difference]: Without dead ends: 31 [2022-10-16 04:42:11,576 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 04:42:11,578 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:11,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:42:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-16 04:42:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-10-16 04:42:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-10-16 04:42:11,588 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 8 [2022-10-16 04:42:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:11,589 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-10-16 04:42:11,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-10-16 04:42:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 04:42:11,591 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:11,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 04:42:11,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting new_lsegErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 176962905, now seen corresponding path program 1 times [2022-10-16 04:42:11,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:11,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685405220] [2022-10-16 04:42:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:11,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:11,714 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 04:42:11,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:11,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685405220] [2022-10-16 04:42:11,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685405220] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:11,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:11,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:42:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496807321] [2022-10-16 04:42:11,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:11,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:42:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:42:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:42:11,718 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:11,771 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-10-16 04:42:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:42:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 04:42:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:11,772 INFO L225 Difference]: With dead ends: 28 [2022-10-16 04:42:11,773 INFO L226 Difference]: Without dead ends: 28 [2022-10-16 04:42:11,773 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 04:42:11,778 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:11,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:42:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-16 04:42:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-10-16 04:42:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-10-16 04:42:11,792 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 8 [2022-10-16 04:42:11,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:11,793 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-10-16 04:42:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:42:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-10-16 04:42:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 04:42:11,794 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:11,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:11,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 04:42:11,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1737362473, now seen corresponding path program 1 times [2022-10-16 04:42:11,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:11,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223330807] [2022-10-16 04:42:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:11,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:11,990 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 04:42:11,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:11,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223330807] [2022-10-16 04:42:11,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223330807] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:11,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:11,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:42:11,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514165730] [2022-10-16 04:42:11,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:11,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:42:11,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:42:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:11,994 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:12,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:12,068 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-10-16 04:42:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:42:12,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-10-16 04:42:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:12,070 INFO L225 Difference]: With dead ends: 32 [2022-10-16 04:42:12,070 INFO L226 Difference]: Without dead ends: 32 [2022-10-16 04:42:12,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:12,075 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:12,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:42:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-16 04:42:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-10-16 04:42:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-10-16 04:42:12,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 10 [2022-10-16 04:42:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:12,093 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-10-16 04:42:12,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-10-16 04:42:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 04:42:12,094 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:12,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:12,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 04:42:12,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:12,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1737362472, now seen corresponding path program 1 times [2022-10-16 04:42:12,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:12,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366141766] [2022-10-16 04:42:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:12,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:12,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:12,340 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 04:42:12,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366141766] [2022-10-16 04:42:12,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366141766] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:12,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:12,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:42:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283160613] [2022-10-16 04:42:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:42:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:42:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:12,344 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:12,402 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-10-16 04:42:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:42:12,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-10-16 04:42:12,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:12,404 INFO L225 Difference]: With dead ends: 41 [2022-10-16 04:42:12,404 INFO L226 Difference]: Without dead ends: 41 [2022-10-16 04:42:12,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:12,406 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:12,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:42:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-16 04:42:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2022-10-16 04:42:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.4) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-10-16 04:42:12,413 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2022-10-16 04:42:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:12,414 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-10-16 04:42:12,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-10-16 04:42:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:42:12,415 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:12,416 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:12,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 04:42:12,416 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting new_lsegErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:12,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1619635355, now seen corresponding path program 1 times [2022-10-16 04:42:12,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:12,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834165036] [2022-10-16 04:42:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:12,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:12,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-16 04:42:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-16 04:42:12,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:12,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834165036] [2022-10-16 04:42:12,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834165036] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:12,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:12,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:42:12,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253901784] [2022-10-16 04:42:12,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:12,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:42:12,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:42:12,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:12,596 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:12,671 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-10-16 04:42:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:42:12,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-10-16 04:42:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:12,673 INFO L225 Difference]: With dead ends: 33 [2022-10-16 04:42:12,673 INFO L226 Difference]: Without dead ends: 33 [2022-10-16 04:42:12,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:12,674 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:12,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:42:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-10-16 04:42:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-10-16 04:42:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-10-16 04:42:12,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2022-10-16 04:42:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:12,681 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-10-16 04:42:12,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-10-16 04:42:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:42:12,682 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:12,682 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:12,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-16 04:42:12,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting new_lsegErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1619635356, now seen corresponding path program 1 times [2022-10-16 04:42:12,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:12,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399453189] [2022-10-16 04:42:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:12,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:12,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-16 04:42:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399453189] [2022-10-16 04:42:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399453189] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:12,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:12,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:42:12,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350515073] [2022-10-16 04:42:12,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:12,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:42:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:42:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:12,940 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:13,001 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-10-16 04:42:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:42:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-10-16 04:42:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:13,003 INFO L225 Difference]: With dead ends: 35 [2022-10-16 04:42:13,003 INFO L226 Difference]: Without dead ends: 35 [2022-10-16 04:42:13,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:42:13,005 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:13,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:42:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-16 04:42:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-10-16 04:42:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-10-16 04:42:13,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-10-16 04:42:13,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:13,012 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-10-16 04:42:13,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-10-16 04:42:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-16 04:42:13,013 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:13,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:13,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 04:42:13,013 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1678716282, now seen corresponding path program 1 times [2022-10-16 04:42:13,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126307634] [2022-10-16 04:42:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:13,100 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 04:42:13,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:13,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126307634] [2022-10-16 04:42:13,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126307634] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:13,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:13,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 04:42:13,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147534370] [2022-10-16 04:42:13,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:13,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 04:42:13,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 04:42:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:42:13,103 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:13,197 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-10-16 04:42:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:42:13,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-10-16 04:42:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:13,198 INFO L225 Difference]: With dead ends: 38 [2022-10-16 04:42:13,199 INFO L226 Difference]: Without dead ends: 38 [2022-10-16 04:42:13,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:42:13,200 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:13,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:42:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-16 04:42:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-10-16 04:42:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.434782608695652) internal successors, (33), 28 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-10-16 04:42:13,206 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2022-10-16 04:42:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:13,206 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-10-16 04:42:13,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-10-16 04:42:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-16 04:42:13,208 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:13,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 04:42:13,208 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1678716283, now seen corresponding path program 1 times [2022-10-16 04:42:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:13,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750730428] [2022-10-16 04:42:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:13,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:13,415 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 04:42:13,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:13,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750730428] [2022-10-16 04:42:13,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750730428] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:13,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:13,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 04:42:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200652522] [2022-10-16 04:42:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:42:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:42:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:42:13,419 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:13,514 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-10-16 04:42:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:42:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-10-16 04:42:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:13,516 INFO L225 Difference]: With dead ends: 50 [2022-10-16 04:42:13,516 INFO L226 Difference]: Without dead ends: 50 [2022-10-16 04:42:13,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:42:13,517 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:13,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 71 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:42:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-16 04:42:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-10-16 04:42:13,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-10-16 04:42:13,523 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 14 [2022-10-16 04:42:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:13,523 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-10-16 04:42:13,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-10-16 04:42:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-16 04:42:13,525 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:13,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:13,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 04:42:13,525 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash 500595490, now seen corresponding path program 1 times [2022-10-16 04:42:13,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:13,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608033701] [2022-10-16 04:42:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:13,601 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 04:42:13,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:13,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608033701] [2022-10-16 04:42:13,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608033701] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:13,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:13,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 04:42:13,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524178677] [2022-10-16 04:42:13,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 04:42:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:13,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 04:42:13,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:42:13,604 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:13,672 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-10-16 04:42:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:42:13,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-10-16 04:42:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:13,674 INFO L225 Difference]: With dead ends: 40 [2022-10-16 04:42:13,674 INFO L226 Difference]: Without dead ends: 40 [2022-10-16 04:42:13,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:42:13,675 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:13,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 67 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:42:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-16 04:42:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-10-16 04:42:13,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-10-16 04:42:13,680 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 15 [2022-10-16 04:42:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:13,681 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-10-16 04:42:13,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 04:42:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-10-16 04:42:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 04:42:13,682 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:13,682 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:13,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 04:42:13,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash 37562311, now seen corresponding path program 1 times [2022-10-16 04:42:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936070248] [2022-10-16 04:42:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:14,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:14,081 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 04:42:14,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936070248] [2022-10-16 04:42:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936070248] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971170490] [2022-10-16 04:42:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:14,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:14,089 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 04:42:14,097 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 04:42:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2022-10-16 04:42:14,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:14,254 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 04:42:14,260 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 04:42:14,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:14,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:14,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 04:42:14,596 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 04:42:14,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:14,962 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 04:42:14,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971170490] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:14,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:14,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-10-16 04:42:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133001266] [2022-10-16 04:42:14,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:14,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-16 04:42:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-16 04:42:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-10-16 04:42:14,966 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:15,658 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-10-16 04:42:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 04:42:15,659 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2022-10-16 04:42:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:15,660 INFO L225 Difference]: With dead ends: 53 [2022-10-16 04:42:15,660 INFO L226 Difference]: Without dead ends: 53 [2022-10-16 04:42:15,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:42:15,662 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:15,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 116 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 04:42:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-16 04:42:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2022-10-16 04:42:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-10-16 04:42:15,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 17 [2022-10-16 04:42:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:15,668 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-10-16 04:42:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-10-16 04:42:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 04:42:15,669 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:15,669 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:15,703 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 04:42:15,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 04:42:15,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:15,873 INFO L85 PathProgramCache]: Analyzing trace with hash 37562312, now seen corresponding path program 1 times [2022-10-16 04:42:15,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:15,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936709011] [2022-10-16 04:42:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:16,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:16,401 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 04:42:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936709011] [2022-10-16 04:42:16,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936709011] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:16,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449078643] [2022-10-16 04:42:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:16,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:16,403 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 04:42:16,425 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 04:42:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:16,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2022-10-16 04:42:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:16,496 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 04:42:16,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:16,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:16,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:16,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:16,710 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 04:42:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:17,177 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 04:42:17,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449078643] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:17,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:17,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-10-16 04:42:17,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826504849] [2022-10-16 04:42:17,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:17,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-16 04:42:17,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:17,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-16 04:42:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-10-16 04:42:17,180 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:17,826 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-10-16 04:42:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 04:42:17,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.375) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-10-16 04:42:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:17,828 INFO L225 Difference]: With dead ends: 53 [2022-10-16 04:42:17,828 INFO L226 Difference]: Without dead ends: 53 [2022-10-16 04:42:17,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-10-16 04:42:17,831 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:17,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 181 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 04:42:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-16 04:42:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-10-16 04:42:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-16 04:42:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-10-16 04:42:17,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 17 [2022-10-16 04:42:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:17,837 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-10-16 04:42:17,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.375) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-10-16 04:42:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:42:17,839 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:17,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:17,874 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 04:42:18,052 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,SelfDestructingSolverStorable13 [2022-10-16 04:42:18,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1575871263, now seen corresponding path program 1 times [2022-10-16 04:42:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:18,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869497915] [2022-10-16 04:42:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:18,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:18,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:18,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:18,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869497915] [2022-10-16 04:42:18,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869497915] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:18,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405455692] [2022-10-16 04:42:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:18,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:18,292 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 04:42:18,310 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 04:42:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:18,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 04:42:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:18,384 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 04:42:18,490 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-16 04:42:18,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-16 04:42:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:18,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:18,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405455692] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:18,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:18,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2022-10-16 04:42:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843362064] [2022-10-16 04:42:18,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:18,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-16 04:42:18,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-16 04:42:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:42:18,549 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:42:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:18,670 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-10-16 04:42:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:42:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2022-10-16 04:42:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:18,671 INFO L225 Difference]: With dead ends: 46 [2022-10-16 04:42:18,672 INFO L226 Difference]: Without dead ends: 46 [2022-10-16 04:42:18,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-10-16 04:42:18,673 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:18,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-10-16 04:42:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-16 04:42:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-10-16 04:42:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-10-16 04:42:18,679 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 18 [2022-10-16 04:42:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:18,679 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-10-16 04:42:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:42:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-10-16 04:42:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:42:18,681 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:18,681 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:18,724 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 04:42:18,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:18,896 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting new_lsegErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1428444069, now seen corresponding path program 1 times [2022-10-16 04:42:18,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:18,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944253324] [2022-10-16 04:42:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:18,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:19,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-16 04:42:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:19,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 04:42:19,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944253324] [2022-10-16 04:42:19,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944253324] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36071932] [2022-10-16 04:42:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:19,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:19,174 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 04:42:19,186 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 04:42:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:19,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-16 04:42:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:19,282 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 04:42:19,381 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-16 04:42:19,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-16 04:42:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 04:42:19,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:19,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36071932] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:19,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:19,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2022-10-16 04:42:19,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009689410] [2022-10-16 04:42:19,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:19,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:42:19,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:42:19,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:42:19,439 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:42:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:19,528 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-10-16 04:42:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:42:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-10-16 04:42:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:19,530 INFO L225 Difference]: With dead ends: 47 [2022-10-16 04:42:19,530 INFO L226 Difference]: Without dead ends: 47 [2022-10-16 04:42:19,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:42:19,532 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:19,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-10-16 04:42:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-16 04:42:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-10-16 04:42:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 38 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-10-16 04:42:19,546 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2022-10-16 04:42:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:19,549 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-10-16 04:42:19,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:42:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-10-16 04:42:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:42:19,553 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:19,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:19,595 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 04:42:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 04:42:19,774 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1575871262, now seen corresponding path program 1 times [2022-10-16 04:42:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:19,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835045006] [2022-10-16 04:42:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:19,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:20,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835045006] [2022-10-16 04:42:20,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835045006] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090130481] [2022-10-16 04:42:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:20,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:20,006 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 04:42:20,017 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 04:42:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 04:42:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:20,107 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 04:42:20,113 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 04:42:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:20,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 04:42:20,250 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:42:20,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:42:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:20,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:24,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090130481] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:24,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:24,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-10-16 04:42:24,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401729052] [2022-10-16 04:42:24,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:24,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 04:42:24,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 04:42:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-16 04:42:24,456 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 04:42:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:24,608 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-10-16 04:42:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:42:24,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2022-10-16 04:42:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:24,609 INFO L225 Difference]: With dead ends: 58 [2022-10-16 04:42:24,609 INFO L226 Difference]: Without dead ends: 58 [2022-10-16 04:42:24,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-10-16 04:42:24,611 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:24,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-10-16 04:42:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-16 04:42:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2022-10-16 04:42:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-10-16 04:42:24,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2022-10-16 04:42:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:24,616 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-10-16 04:42:24,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 04:42:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-10-16 04:42:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-16 04:42:24,618 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:24,618 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:24,660 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 04:42:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 04:42:24,832 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting new_lsegErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:24,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1952827573, now seen corresponding path program 1 times [2022-10-16 04:42:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230094614] [2022-10-16 04:42:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:24,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:24,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-16 04:42:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:25,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:25,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230094614] [2022-10-16 04:42:25,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230094614] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:25,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052224512] [2022-10-16 04:42:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:25,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:25,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:25,132 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 04:42:25,141 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 04:42:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-16 04:42:25,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:25,242 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 04:42:25,247 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 04:42:25,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:25,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-16 04:42:25,373 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:42:25,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:42:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:25,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:29,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052224512] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:29,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:29,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-10-16 04:42:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799334898] [2022-10-16 04:42:29,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 04:42:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 04:42:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-10-16 04:42:29,545 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 04:42:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:29,693 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-10-16 04:42:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:42:29,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-10-16 04:42:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:29,695 INFO L225 Difference]: With dead ends: 46 [2022-10-16 04:42:29,695 INFO L226 Difference]: Without dead ends: 46 [2022-10-16 04:42:29,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-10-16 04:42:29,696 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:29,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 111 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-10-16 04:42:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-16 04:42:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-10-16 04:42:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-10-16 04:42:29,701 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 22 [2022-10-16 04:42:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:29,702 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-10-16 04:42:29,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 04:42:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-10-16 04:42:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:42:29,703 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:29,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:29,742 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 04:42:29,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 04:42:29,919 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1164429941, now seen corresponding path program 1 times [2022-10-16 04:42:29,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:29,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468153190] [2022-10-16 04:42:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:30,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:30,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468153190] [2022-10-16 04:42:30,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468153190] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437850694] [2022-10-16 04:42:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:30,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:30,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:30,160 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 04:42:30,182 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 04:42:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:30,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2022-10-16 04:42:30,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:30,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:42:30,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-16 04:42:30,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:30,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 04:42:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:30,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:30,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437850694] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:30,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:30,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-10-16 04:42:30,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709726332] [2022-10-16 04:42:30,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:30,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-16 04:42:30,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:30,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-16 04:42:30,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-10-16 04:42:30,813 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 22 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:31,282 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-10-16 04:42:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 04:42:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 22 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2022-10-16 04:42:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:31,284 INFO L225 Difference]: With dead ends: 55 [2022-10-16 04:42:31,284 INFO L226 Difference]: Without dead ends: 55 [2022-10-16 04:42:31,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-10-16 04:42:31,286 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 148 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:31,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 159 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:42:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-16 04:42:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2022-10-16 04:42:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-10-16 04:42:31,291 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 18 [2022-10-16 04:42:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:31,291 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-10-16 04:42:31,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 22 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-10-16 04:42:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:42:31,292 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:31,293 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:31,334 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 04:42:31,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:31,505 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1967657382, now seen corresponding path program 2 times [2022-10-16 04:42:31,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:31,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069404612] [2022-10-16 04:42:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:31,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:31,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:31,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:31,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069404612] [2022-10-16 04:42:31,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069404612] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:31,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119082430] [2022-10-16 04:42:31,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:42:31,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:31,955 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 04:42:31,985 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 04:42:32,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:42:32,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:32,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 70 conjunts are in the unsatisfiable core [2022-10-16 04:42:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:32,074 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 04:42:32,080 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 04:42:32,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:32,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:32,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:32,549 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:42:32,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-10-16 04:42:32,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 04:42:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:32,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:32,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-10-16 04:42:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:33,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119082430] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:33,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:33,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-10-16 04:42:33,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797625196] [2022-10-16 04:42:33,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:33,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:42:33,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:42:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:42:33,381 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:34,211 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-10-16 04:42:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-16 04:42:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2022-10-16 04:42:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:34,213 INFO L225 Difference]: With dead ends: 55 [2022-10-16 04:42:34,213 INFO L226 Difference]: Without dead ends: 55 [2022-10-16 04:42:34,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:42:34,216 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:34,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 120 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 442 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-10-16 04:42:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-16 04:42:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-10-16 04:42:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-10-16 04:42:34,220 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 20 [2022-10-16 04:42:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:34,221 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-10-16 04:42:34,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-10-16 04:42:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-16 04:42:34,222 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:34,222 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:34,247 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 04:42:34,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:34,428 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1967657381, now seen corresponding path program 2 times [2022-10-16 04:42:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:34,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382675698] [2022-10-16 04:42:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:34,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:35,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:35,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382675698] [2022-10-16 04:42:35,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382675698] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:35,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438024824] [2022-10-16 04:42:35,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:42:35,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:35,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:35,019 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 04:42:35,045 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 04:42:35,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:42:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:35,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 70 conjunts are in the unsatisfiable core [2022-10-16 04:42:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:35,126 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 04:42:35,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:35,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:35,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:35,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:35,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:35,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-10-16 04:42:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:35,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:35,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:36,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438024824] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:36,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:36,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 29 [2022-10-16 04:42:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609164520] [2022-10-16 04:42:36,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:36,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-16 04:42:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:36,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-16 04:42:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-10-16 04:42:36,168 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:36,843 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-10-16 04:42:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:42:36,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-10-16 04:42:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:36,844 INFO L225 Difference]: With dead ends: 58 [2022-10-16 04:42:36,844 INFO L226 Difference]: Without dead ends: 58 [2022-10-16 04:42:36,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:42:36,846 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:36,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 167 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 354 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-10-16 04:42:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-16 04:42:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-10-16 04:42:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.3) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-10-16 04:42:36,859 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 20 [2022-10-16 04:42:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:36,859 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-10-16 04:42:36,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-10-16 04:42:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-16 04:42:36,861 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:36,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:36,907 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 04:42:37,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:37,077 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:37,077 INFO L85 PathProgramCache]: Analyzing trace with hash -867838398, now seen corresponding path program 2 times [2022-10-16 04:42:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:37,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630467895] [2022-10-16 04:42:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:37,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630467895] [2022-10-16 04:42:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630467895] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147453995] [2022-10-16 04:42:37,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:42:37,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:37,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:37,590 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 04:42:37,600 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 04:42:37,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:42:37,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 61 conjunts are in the unsatisfiable core [2022-10-16 04:42:37,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:37,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-16 04:42:37,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-16 04:42:37,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:37,898 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:42:37,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2022-10-16 04:42:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:37,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:38,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-10-16 04:42:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:38,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147453995] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:38,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:38,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-10-16 04:42:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120417247] [2022-10-16 04:42:38,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:38,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-16 04:42:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-16 04:42:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:42:38,149 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 23 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:38,571 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-10-16 04:42:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 04:42:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 23 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-10-16 04:42:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:38,573 INFO L225 Difference]: With dead ends: 55 [2022-10-16 04:42:38,573 INFO L226 Difference]: Without dead ends: 55 [2022-10-16 04:42:38,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 04:42:38,575 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:38,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 221 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-10-16 04:42:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-16 04:42:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-10-16 04:42:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.275) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-10-16 04:42:38,579 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 21 [2022-10-16 04:42:38,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:38,579 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-10-16 04:42:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 23 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-10-16 04:42:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-16 04:42:38,580 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:38,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:38,631 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 04:42:38,781 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,SelfDestructingSolverStorable21 [2022-10-16 04:42:38,781 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash -536886907, now seen corresponding path program 1 times [2022-10-16 04:42:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:38,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155134557] [2022-10-16 04:42:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:38,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:38,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 04:42:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:38,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155134557] [2022-10-16 04:42:38,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155134557] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:42:38,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:42:38,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 04:42:38,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600539414] [2022-10-16 04:42:38,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:42:38,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:42:38,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:38,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:42:38,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:42:38,968 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:39,063 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-10-16 04:42:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:42:39,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-10-16 04:42:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:39,065 INFO L225 Difference]: With dead ends: 53 [2022-10-16 04:42:39,065 INFO L226 Difference]: Without dead ends: 53 [2022-10-16 04:42:39,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:42:39,066 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:39,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 57 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:42:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-16 04:42:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-10-16 04:42:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.25) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-16 04:42:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-10-16 04:42:39,070 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 22 [2022-10-16 04:42:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:39,071 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-10-16 04:42:39,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-10-16 04:42:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-16 04:42:39,072 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:39,072 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:39,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-16 04:42:39,073 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting new_lsegErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2028135599, now seen corresponding path program 2 times [2022-10-16 04:42:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:39,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187327463] [2022-10-16 04:42:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:39,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-16 04:42:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:39,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:39,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 04:42:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:39,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187327463] [2022-10-16 04:42:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187327463] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619782074] [2022-10-16 04:42:39,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:42:39,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:39,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:39,634 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 04:42:39,658 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 04:42:39,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:42:39,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:39,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 04:42:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:39,770 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 04:42:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:42:39,933 INFO L356 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2022-10-16 04:42:39,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-10-16 04:42:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 04:42:39,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:40,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619782074] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:40,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:40,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-10-16 04:42:40,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896573409] [2022-10-16 04:42:40,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:40,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 04:42:40,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 04:42:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-10-16 04:42:40,177 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:40,340 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-10-16 04:42:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:42:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2022-10-16 04:42:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:40,342 INFO L225 Difference]: With dead ends: 57 [2022-10-16 04:42:40,342 INFO L226 Difference]: Without dead ends: 57 [2022-10-16 04:42:40,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-10-16 04:42:40,344 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:40,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 112 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-10-16 04:42:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-16 04:42:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-10-16 04:42:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.255813953488372) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-16 04:42:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-10-16 04:42:40,348 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 34 [2022-10-16 04:42:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:40,349 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-10-16 04:42:40,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-10-16 04:42:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:42:40,350 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:40,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:40,388 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 04:42:40,564 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,SelfDestructingSolverStorable23 [2022-10-16 04:42:40,565 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:40,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash -969658389, now seen corresponding path program 2 times [2022-10-16 04:42:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:40,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928146730] [2022-10-16 04:42:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:40,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:40,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:40,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:41,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 04:42:41,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928146730] [2022-10-16 04:42:41,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928146730] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:41,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520912448] [2022-10-16 04:42:41,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:42:41,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:41,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:41,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:41,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-16 04:42:41,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:42:41,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-16 04:42:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:41,217 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 04:42:41,372 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-10-16 04:42:41,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 30 [2022-10-16 04:42:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 04:42:41,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:41,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520912448] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:41,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:41,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2022-10-16 04:42:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079480937] [2022-10-16 04:42:41,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 04:42:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 04:42:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-10-16 04:42:41,465 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:41,704 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-10-16 04:42:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 04:42:41,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-10-16 04:42:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:41,707 INFO L225 Difference]: With dead ends: 58 [2022-10-16 04:42:41,707 INFO L226 Difference]: Without dead ends: 58 [2022-10-16 04:42:41,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-10-16 04:42:41,708 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:41,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-10-16 04:42:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-16 04:42:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-10-16 04:42:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (8), 8 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-16 04:42:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-10-16 04:42:41,714 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 26 [2022-10-16 04:42:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:41,715 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-10-16 04:42:41,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-10-16 04:42:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:42:41,715 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:41,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:41,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:41,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-10-16 04:42:41,917 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash -969658388, now seen corresponding path program 2 times [2022-10-16 04:42:41,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:41,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981523194] [2022-10-16 04:42:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:41,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:42,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:42,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 04:42:42,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981523194] [2022-10-16 04:42:42,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981523194] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532536058] [2022-10-16 04:42:42,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:42:42,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:42,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:42,671 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:42,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-16 04:42:42,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:42:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-16 04:42:42,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:42,795 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 04:42:42,800 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 04:42:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:43,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-10-16 04:42:43,062 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-10-16 04:42:43,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-10-16 04:42:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:43,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:43,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532536058] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:43,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:43,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2022-10-16 04:42:43,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524103435] [2022-10-16 04:42:43,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:43,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 04:42:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 04:42:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-10-16 04:42:43,308 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:43,604 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-10-16 04:42:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-16 04:42:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-10-16 04:42:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:43,606 INFO L225 Difference]: With dead ends: 69 [2022-10-16 04:42:43,606 INFO L226 Difference]: Without dead ends: 69 [2022-10-16 04:42:43,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:42:43,607 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:43,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 98 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-10-16 04:42:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-16 04:42:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2022-10-16 04:42:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.255813953488372) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-16 04:42:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-10-16 04:42:43,612 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 26 [2022-10-16 04:42:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:43,612 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-10-16 04:42:43,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-10-16 04:42:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-16 04:42:43,613 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:43,613 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:43,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:43,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-10-16 04:42:43,824 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting new_lsegErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1109271873, now seen corresponding path program 2 times [2022-10-16 04:42:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:43,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487585626] [2022-10-16 04:42:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:44,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-16 04:42:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:44,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 04:42:44,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:44,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487585626] [2022-10-16 04:42:44,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487585626] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:44,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573854625] [2022-10-16 04:42:44,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:42:44,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:44,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:44,695 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:44,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-16 04:42:44,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:42:44,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:44,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-16 04:42:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:44,838 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 04:42:44,842 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 04:42:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:45,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:45,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:42:45,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-10-16 04:42:45,080 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-10-16 04:42:45,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-10-16 04:42:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:45,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:45,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573854625] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:45,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:45,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-10-16 04:42:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268492472] [2022-10-16 04:42:45,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 04:42:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 04:42:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-10-16 04:42:45,322 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 04:42:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:45,685 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-10-16 04:42:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-16 04:42:45,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2022-10-16 04:42:45,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:45,688 INFO L225 Difference]: With dead ends: 59 [2022-10-16 04:42:45,689 INFO L226 Difference]: Without dead ends: 59 [2022-10-16 04:42:45,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:42:45,691 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:45,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 155 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 88 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-10-16 04:42:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-16 04:42:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-10-16 04:42:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-16 04:42:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-10-16 04:42:45,703 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 30 [2022-10-16 04:42:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:45,704 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-10-16 04:42:45,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 04:42:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-10-16 04:42:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 04:42:45,705 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:45,705 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:45,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:45,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:45,921 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash -767411481, now seen corresponding path program 3 times [2022-10-16 04:42:45,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:45,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867060817] [2022-10-16 04:42:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:45,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:46,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:46,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:46,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867060817] [2022-10-16 04:42:46,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867060817] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:46,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749071278] [2022-10-16 04:42:46,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:42:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:46,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:46,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-16 04:42:46,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:42:46,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 72 conjunts are in the unsatisfiable core [2022-10-16 04:42:46,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:46,682 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 04:42:46,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:46,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:47,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:47,235 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:42:47,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-10-16 04:42:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:47,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:47,547 INFO L356 Elim1Store]: treesize reduction 27, result has 55.0 percent of original size [2022-10-16 04:42:47,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 155 [2022-10-16 04:42:47,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 139 [2022-10-16 04:42:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:48,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749071278] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:48,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:48,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 38 [2022-10-16 04:42:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807412396] [2022-10-16 04:42:48,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:48,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-16 04:42:48,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-16 04:42:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:42:48,014 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 33 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:48,607 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-10-16 04:42:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:42:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 33 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2022-10-16 04:42:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:48,610 INFO L225 Difference]: With dead ends: 60 [2022-10-16 04:42:48,610 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 04:42:48,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2022-10-16 04:42:48,611 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:48,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 193 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 456 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-10-16 04:42:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 04:42:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-10-16 04:42:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 46 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-16 04:42:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-10-16 04:42:48,619 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 23 [2022-10-16 04:42:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:48,619 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-10-16 04:42:48,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 33 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:42:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-10-16 04:42:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-16 04:42:48,621 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:48,621 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:48,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:48,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-10-16 04:42:48,836 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:48,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1980046165, now seen corresponding path program 3 times [2022-10-16 04:42:48,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:48,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733385123] [2022-10-16 04:42:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:48,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:49,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:49,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733385123] [2022-10-16 04:42:49,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733385123] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806053718] [2022-10-16 04:42:49,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:42:49,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:49,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:49,380 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:49,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-16 04:42:49,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:42:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:49,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 69 conjunts are in the unsatisfiable core [2022-10-16 04:42:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:49,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-16 04:42:49,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-16 04:42:49,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:49,846 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:42:49,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2022-10-16 04:42:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:49,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:50,101 INFO L356 Elim1Store]: treesize reduction 27, result has 55.0 percent of original size [2022-10-16 04:42:50,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 153 [2022-10-16 04:42:50,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 137 [2022-10-16 04:42:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:50,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806053718] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:50,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:50,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 32 [2022-10-16 04:42:50,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461070214] [2022-10-16 04:42:50,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:50,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-16 04:42:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-16 04:42:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-10-16 04:42:50,381 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:50,869 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-10-16 04:42:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:42:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-10-16 04:42:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:50,870 INFO L225 Difference]: With dead ends: 56 [2022-10-16 04:42:50,870 INFO L226 Difference]: Without dead ends: 43 [2022-10-16 04:42:50,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:42:50,874 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:50,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 231 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 293 Invalid, 0 Unknown, 2 Unchecked, 0.2s Time] [2022-10-16 04:42:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-16 04:42:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-10-16 04:42:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-16 04:42:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-10-16 04:42:50,886 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 24 [2022-10-16 04:42:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:50,886 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-10-16 04:42:50,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 04:42:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-10-16 04:42:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 04:42:50,890 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:50,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:50,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:51,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-10-16 04:42:51,102 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash 60333949, now seen corresponding path program 1 times [2022-10-16 04:42:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072090094] [2022-10-16 04:42:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:51,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:51,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:51,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:42:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:51,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072090094] [2022-10-16 04:42:51,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072090094] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612060969] [2022-10-16 04:42:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:51,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:51,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:51,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-16 04:42:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2022-10-16 04:42:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:51,617 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 04:42:51,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:51,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-10-16 04:42:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:51,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:51,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612060969] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:51,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:51,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 17 [2022-10-16 04:42:51,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058138685] [2022-10-16 04:42:51,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 04:42:51,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 04:42:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-10-16 04:42:51,849 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 04:42:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:52,100 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-10-16 04:42:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-16 04:42:52,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-10-16 04:42:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:52,101 INFO L225 Difference]: With dead ends: 49 [2022-10-16 04:42:52,101 INFO L226 Difference]: Without dead ends: 49 [2022-10-16 04:42:52,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:42:52,102 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:52,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 73 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 225 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-10-16 04:42:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-16 04:42:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-10-16 04:42:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.3125) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-16 04:42:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-10-16 04:42:52,107 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 25 [2022-10-16 04:42:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:52,107 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-10-16 04:42:52,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-10-16 04:42:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-10-16 04:42:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-16 04:42:52,108 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:52,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:52,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:52,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:52,321 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash 60333950, now seen corresponding path program 1 times [2022-10-16 04:42:52,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:52,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433807602] [2022-10-16 04:42:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:52,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:52,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:42:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:52,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:42:52,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:52,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433807602] [2022-10-16 04:42:52,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433807602] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:52,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307764059] [2022-10-16 04:42:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:52,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:52,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:52,818 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:52,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-16 04:42:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-16 04:42:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:52,958 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 04:42:53,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:53,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:42:53,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-10-16 04:42:53,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:42:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:53,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:42:53,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307764059] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:42:53,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:42:53,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 23 [2022-10-16 04:42:53,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834076968] [2022-10-16 04:42:53,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:53,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 04:42:53,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:53,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 04:42:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:42:53,429 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:54,198 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-10-16 04:42:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 04:42:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2022-10-16 04:42:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:54,200 INFO L225 Difference]: With dead ends: 68 [2022-10-16 04:42:54,200 INFO L226 Difference]: Without dead ends: 68 [2022-10-16 04:42:54,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-10-16 04:42:54,202 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:54,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 151 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 281 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-10-16 04:42:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-10-16 04:42:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2022-10-16 04:42:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-16 04:42:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-10-16 04:42:54,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 25 [2022-10-16 04:42:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:54,206 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-10-16 04:42:54,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-16 04:42:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-10-16 04:42:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-16 04:42:54,207 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:54,207 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:54,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:54,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:54,415 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting new_lsegErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -187605063, now seen corresponding path program 3 times [2022-10-16 04:42:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095687015] [2022-10-16 04:42:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:54,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-16 04:42:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:55,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:55,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-16 04:42:55,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095687015] [2022-10-16 04:42:55,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095687015] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084945089] [2022-10-16 04:42:55,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:42:55,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:55,900 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:55,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-10-16 04:42:56,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-16 04:42:56,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:42:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-16 04:42:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:42:56,551 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 04:42:56,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:42:56,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:42:56,958 INFO L356 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-10-16 04:42:56,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-10-16 04:42:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-16 04:42:56,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:42:57,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084945089] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:57,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:42:57,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-10-16 04:42:57,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710857975] [2022-10-16 04:42:57,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:42:57,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-16 04:42:57,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:42:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-16 04:42:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-10-16 04:42:57,278 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-16 04:42:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:42:57,581 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-10-16 04:42:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 04:42:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2022-10-16 04:42:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:42:57,583 INFO L225 Difference]: With dead ends: 50 [2022-10-16 04:42:57,583 INFO L226 Difference]: Without dead ends: 50 [2022-10-16 04:42:57,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2022-10-16 04:42:57,585 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:42:57,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 114 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-10-16 04:42:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-16 04:42:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-10-16 04:42:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 40 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 7 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:42:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-10-16 04:42:57,589 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 42 [2022-10-16 04:42:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:42:57,590 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-10-16 04:42:57,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-16 04:42:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-10-16 04:42:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-16 04:42:57,591 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:42:57,591 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:42:57,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-10-16 04:42:57,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:57,800 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting new_lsegErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:42:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:42:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash -187605062, now seen corresponding path program 3 times [2022-10-16 04:42:57,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:42:57,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878705958] [2022-10-16 04:42:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:42:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:42:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:58,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-16 04:42:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:58,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:59,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:59,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:42:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:42:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-16 04:42:59,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:42:59,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878705958] [2022-10-16 04:42:59,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878705958] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:42:59,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64841985] [2022-10-16 04:42:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:42:59,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:42:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:42:59,769 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:42:59,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-10-16 04:43:00,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-10-16 04:43:00,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:43:00,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:00,476 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 04:43:00,481 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 04:43:03,307 INFO L356 Elim1Store]: treesize reduction 75, result has 31.2 percent of original size [2022-10-16 04:43:03,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 42 [2022-10-16 04:43:03,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:43:03,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-10-16 04:43:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-16 04:43:03,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:04,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64841985] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:04,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:43:04,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-10-16 04:43:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728207609] [2022-10-16 04:43:04,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:04,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-16 04:43:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-16 04:43:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=681, Unknown=1, NotChecked=0, Total=812 [2022-10-16 04:43:04,453 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 27 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-16 04:43:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:05,112 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-10-16 04:43:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 04:43:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 42 [2022-10-16 04:43:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:05,114 INFO L225 Difference]: With dead ends: 52 [2022-10-16 04:43:05,114 INFO L226 Difference]: Without dead ends: 52 [2022-10-16 04:43:05,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=260, Invalid=1071, Unknown=1, NotChecked=0, Total=1332 [2022-10-16 04:43:05,116 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:05,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 145 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 125 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-10-16 04:43:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-16 04:43:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-10-16 04:43:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 7 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:43:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-10-16 04:43:05,125 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 42 [2022-10-16 04:43:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:05,126 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-10-16 04:43:05,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-16 04:43:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-10-16 04:43:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-16 04:43:05,127 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:05,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:05,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-10-16 04:43:05,328 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:43:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash -270258955, now seen corresponding path program 3 times [2022-10-16 04:43:05,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:05,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420602604] [2022-10-16 04:43:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:05,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:05,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:43:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:05,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:06,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:06,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-16 04:43:06,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:06,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420602604] [2022-10-16 04:43:06,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420602604] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:06,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820926030] [2022-10-16 04:43:06,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:43:06,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:06,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:06,766 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:43:06,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-10-16 04:43:06,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:43:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-16 04:43:06,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:06,974 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 04:43:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:07,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:07,386 INFO L356 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-10-16 04:43:07,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-10-16 04:43:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-16 04:43:07,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:07,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820926030] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:07,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:43:07,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-10-16 04:43:07,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698626934] [2022-10-16 04:43:07,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:07,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-16 04:43:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-16 04:43:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2022-10-16 04:43:07,674 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (6), 2 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-16 04:43:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:07,884 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-10-16 04:43:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:43:07,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (6), 2 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 34 [2022-10-16 04:43:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:07,885 INFO L225 Difference]: With dead ends: 51 [2022-10-16 04:43:07,885 INFO L226 Difference]: Without dead ends: 51 [2022-10-16 04:43:07,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2022-10-16 04:43:07,886 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:07,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 73 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 114 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-10-16 04:43:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-16 04:43:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-10-16 04:43:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:43:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-10-16 04:43:07,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 34 [2022-10-16 04:43:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:07,890 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-10-16 04:43:07,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (6), 2 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-16 04:43:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-10-16 04:43:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:43:07,891 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:07,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:07,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:08,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-10-16 04:43:08,104 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:43:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1870350719, now seen corresponding path program 1 times [2022-10-16 04:43:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:08,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602046722] [2022-10-16 04:43:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:08,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:43:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:43:08,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602046722] [2022-10-16 04:43:08,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602046722] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68355916] [2022-10-16 04:43:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:08,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:08,404 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:43:08,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-10-16 04:43:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:08,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-16 04:43:08,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:08,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-16 04:43:08,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-10-16 04:43:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:43:08,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-16 04:43:08,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68355916] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:43:08,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:43:08,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 16 [2022-10-16 04:43:08,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398804645] [2022-10-16 04:43:08,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:08,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-16 04:43:08,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:08,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-16 04:43:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-10-16 04:43:08,702 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:43:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:08,992 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-10-16 04:43:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 04:43:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-10-16 04:43:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:08,993 INFO L225 Difference]: With dead ends: 51 [2022-10-16 04:43:08,993 INFO L226 Difference]: Without dead ends: 51 [2022-10-16 04:43:08,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-10-16 04:43:08,995 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:08,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 166 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:43:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-16 04:43:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-10-16 04:43:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:43:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-10-16 04:43:08,998 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 26 [2022-10-16 04:43:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:08,999 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-10-16 04:43:08,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 04:43:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-10-16 04:43:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-16 04:43:08,999 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:09,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:09,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:09,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:09,200 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:43:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:09,201 INFO L85 PathProgramCache]: Analyzing trace with hash -270258954, now seen corresponding path program 3 times [2022-10-16 04:43:09,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:09,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763853101] [2022-10-16 04:43:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:43:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:10,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:10,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:10,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-16 04:43:10,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763853101] [2022-10-16 04:43:10,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763853101] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635700600] [2022-10-16 04:43:10,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:43:10,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:10,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:10,898 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:43:10,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-10-16 04:43:11,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-16 04:43:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:11,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-16 04:43:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:11,131 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 04:43:11,135 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 04:43:11,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:11,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 04:43:11,710 INFO L356 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-10-16 04:43:11,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 31 [2022-10-16 04:43:11,753 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-10-16 04:43:11,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 65 [2022-10-16 04:43:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-16 04:43:11,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:18,171 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-10-16 04:43:18,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635700600] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:18,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:43:18,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2022-10-16 04:43:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923010781] [2022-10-16 04:43:18,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 04:43:18,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 04:43:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:43:18,176 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 24 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-16 04:43:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:18,619 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-10-16 04:43:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:43:18,620 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 34 [2022-10-16 04:43:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:18,621 INFO L225 Difference]: With dead ends: 65 [2022-10-16 04:43:18,621 INFO L226 Difference]: Without dead ends: 65 [2022-10-16 04:43:18,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-10-16 04:43:18,622 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:18,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 91 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-10-16 04:43:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-16 04:43:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-10-16 04:43:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 7 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:43:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-10-16 04:43:18,626 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 34 [2022-10-16 04:43:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:18,627 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-10-16 04:43:18,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0) internal successors, (42), 22 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-10-16 04:43:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-10-16 04:43:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 04:43:18,628 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:18,628 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:18,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:18,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:18,840 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:43:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:18,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2112344804, now seen corresponding path program 2 times [2022-10-16 04:43:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:18,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836118542] [2022-10-16 04:43:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:19,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:43:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:19,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:43:19,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:19,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836118542] [2022-10-16 04:43:19,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836118542] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:19,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838656457] [2022-10-16 04:43:19,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:43:19,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:19,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:19,627 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:43:19,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-10-16 04:43:19,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:43:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:19,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 83 conjunts are in the unsatisfiable core [2022-10-16 04:43:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:19,818 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 04:43:19,880 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 04:43:20,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:43:20,175 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:43:20,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:43:20,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:43:20,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-16 04:43:20,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:43:20,622 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-16 04:43:20,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 24 [2022-10-16 04:43:20,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 04:43:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:20,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:20,919 INFO L356 Elim1Store]: treesize reduction 5, result has 79.2 percent of original size [2022-10-16 04:43:20,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-10-16 04:43:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:21,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838656457] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:43:21,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:43:21,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17] total 47 [2022-10-16 04:43:21,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49260083] [2022-10-16 04:43:21,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:21,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-10-16 04:43:21,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:21,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-10-16 04:43:21,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2022-10-16 04:43:21,666 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 48 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 38 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 04:43:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:22,638 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-10-16 04:43:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 04:43:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 38 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2022-10-16 04:43:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:22,640 INFO L225 Difference]: With dead ends: 64 [2022-10-16 04:43:22,640 INFO L226 Difference]: Without dead ends: 64 [2022-10-16 04:43:22,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=285, Invalid=3021, Unknown=0, NotChecked=0, Total=3306 [2022-10-16 04:43:22,642 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:22,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 203 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 693 Invalid, 0 Unknown, 113 Unchecked, 0.5s Time] [2022-10-16 04:43:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-16 04:43:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-10-16 04:43:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:43:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-10-16 04:43:22,646 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 28 [2022-10-16 04:43:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:22,647 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-10-16 04:43:22,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 38 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-16 04:43:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-10-16 04:43:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-16 04:43:22,648 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:22,648 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:22,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:22,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-10-16 04:43:22,863 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:43:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2112344805, now seen corresponding path program 2 times [2022-10-16 04:43:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479947918] [2022-10-16 04:43:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:22,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:23,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:43:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:23,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:43:24,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479947918] [2022-10-16 04:43:24,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479947918] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:24,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934925363] [2022-10-16 04:43:24,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:43:24,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:24,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:24,029 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:43:24,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-10-16 04:43:24,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:43:24,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:24,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 102 conjunts are in the unsatisfiable core [2022-10-16 04:43:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:24,209 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 04:43:24,317 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 04:43:24,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:43:24,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:43:24,627 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:43:24,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:43:24,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-16 04:43:24,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-10-16 04:43:25,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:43:25,171 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-10-16 04:43:25,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 53 [2022-10-16 04:43:25,180 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-16 04:43:25,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2022-10-16 04:43:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:25,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:26,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 127 [2022-10-16 04:43:26,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934925363] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:26,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:43:26,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-10-16 04:43:26,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945961981] [2022-10-16 04:43:26,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:26,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-16 04:43:26,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-16 04:43:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1773, Unknown=0, NotChecked=0, Total=1892 [2022-10-16 04:43:26,413 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 28 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 04:43:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:28,628 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2022-10-16 04:43:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-10-16 04:43:28,629 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 28 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-10-16 04:43:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:28,630 INFO L225 Difference]: With dead ends: 67 [2022-10-16 04:43:28,630 INFO L226 Difference]: Without dead ends: 67 [2022-10-16 04:43:28,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=282, Invalid=3378, Unknown=0, NotChecked=0, Total=3660 [2022-10-16 04:43:28,632 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:28,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 264 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 576 Invalid, 0 Unknown, 164 Unchecked, 0.4s Time] [2022-10-16 04:43:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-10-16 04:43:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-10-16 04:43:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:43:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-10-16 04:43:28,637 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 28 [2022-10-16 04:43:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:28,637 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-10-16 04:43:28,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 28 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-16 04:43:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-10-16 04:43:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-16 04:43:28,640 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:28,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:28,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-10-16 04:43:28,853 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:43:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1058177784, now seen corresponding path program 2 times [2022-10-16 04:43:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:28,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605928522] [2022-10-16 04:43:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:29,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-16 04:43:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:29,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 04:43:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:43:29,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605928522] [2022-10-16 04:43:29,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605928522] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:29,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037780278] [2022-10-16 04:43:29,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:43:29,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:43:29,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:43:29,599 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:43:29,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-10-16 04:43:29,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:43:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:43:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 83 conjunts are in the unsatisfiable core [2022-10-16 04:43:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:43:29,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:43:29,845 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 04:43:30,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-10-16 04:43:30,132 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-16 04:43:30,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-16 04:43:30,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-16 04:43:30,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-16 04:43:30,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 04:43:30,573 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-16 04:43:30,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 24 [2022-10-16 04:43:30,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 04:43:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:43:30,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:43:31,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037780278] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:43:31,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 04:43:31,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2022-10-16 04:43:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370071149] [2022-10-16 04:43:31,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 04:43:31,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:43:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:43:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:43:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2022-10-16 04:43:31,119 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:43:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:43:31,933 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-10-16 04:43:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 04:43:31,933 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-10-16 04:43:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:43:31,934 INFO L225 Difference]: With dead ends: 66 [2022-10-16 04:43:31,934 INFO L226 Difference]: Without dead ends: 66 [2022-10-16 04:43:31,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=222, Invalid=2228, Unknown=0, NotChecked=0, Total=2450 [2022-10-16 04:43:31,939 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-16 04:43:31,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 241 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 566 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-10-16 04:43:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-10-16 04:43:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-10-16 04:43:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-10-16 04:43:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-10-16 04:43:31,950 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 29 [2022-10-16 04:43:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:43:31,951 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-10-16 04:43:31,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 27 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 04:43:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-10-16 04:43:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-16 04:43:31,951 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:43:31,952 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:43:31,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-10-16 04:43:32,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-10-16 04:43:32,157 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting new_lsegErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-10-16 04:43:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:43:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash -352598845, now seen corresponding path program 4 times [2022-10-16 04:43:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:43:32,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981492418] [2022-10-16 04:43:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:43:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:43:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:32,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-16 04:43:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:43:33,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 04:43:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat