public void variableCache() { var prog = SymbooglixLibTests.SymbooglixTest.LoadProgramFrom(@" procedure main() { var x:int; var y:int; return; } ", "test.bpl"); // The Program needs to be annotated with ProgramLocations for this test to work var PM = new Symbooglix.Transform.PassManager(); PM.Add(new Symbooglix.Annotation.ProgramLocationAnnotater()); PM.Run(prog); var pool = new CachingSymbolicPool(); // Get the Variables we will request SymbolicVariables for var mainImpl = prog.TopLevelDeclarations.OfType <Implementation>().Where(i => i.Name == "main").First(); var xVar = mainImpl.LocVars[0]; var yVar = mainImpl.LocVars[1]; // Make a few ExecutionStates. We don't need to do anything with them, we are effectively using // them as a key into our data structure var state0 = MkExecutionState(); var state1 = state0.Clone(xVar.GetProgramLocation()); // HACK: Just use any old program location var state2 = state1.Clone(xVar.GetProgramLocation()); var xSyms = new List <SymbolicVariable>(); var ySyms = new List <SymbolicVariable>(); xSyms.Add(pool.GetFreshSymbolic(xVar, state0)); ySyms.Add(pool.GetFreshSymbolic(yVar, state0)); xSyms.Add(pool.GetFreshSymbolic(xVar, state1)); xSyms.Add(pool.GetFreshSymbolic(xVar, state2)); ySyms.Add(pool.GetFreshSymbolic(yVar, state1)); ySyms.Add(pool.GetFreshSymbolic(yVar, state2)); // Now check we only ever got two instances foreach (var sym in xSyms) { Assert.IsNotNull(sym); Assert.AreSame(xSyms[0], sym); } foreach (var sym in ySyms) { Assert.IsNotNull(sym); Assert.AreSame(ySyms[0], sym); } // Now State1 will ask for a new symbolic so it should get something new var xSymFirst = xSyms[0]; xSyms.Clear(); xSyms.Add(pool.GetFreshSymbolic(xVar, state1)); xSyms.Add(pool.GetFreshSymbolic(xVar, state0)); xSyms.Add(pool.GetFreshSymbolic(xVar, state2)); Assert.AreNotSame(xSymFirst, xSyms[0]); foreach (var sym in xSyms) { Assert.IsNotNull(sym); Assert.AreSame(xSyms[0], sym); } // Create a new state it should not get xSymFirst because even though it has never asked for a symbolic before // the cache should be aware it is a child of state 1 which has already been given "xSymFirst". var state3 = state1.Clone(xVar.GetProgramLocation()); var state3Request = pool.GetFreshSymbolic(xVar, state3); Assert.AreNotSame(xSymFirst, state3Request); }
public static int RealMain(String[] args) { // Debug log output goes to standard error. Debug.Listeners.Add(new ExceptionThrowingTextWritierTraceListener(Console.Error)); // FIXME: Urgh... we are forced to use Boogie's command line // parser becaue the Boogie program resolver/type checker // is dependent on the parser being used...EURGH! CommandLineOptions.Install(new Microsoft.Boogie.CommandLineOptions()); var options = new CmdLineOpts(); if (!CommandLine.Parser.Default.ParseArguments(args, options)) { Console.WriteLine("Failed to parse args"); ExitWith(ExitCode.COMMAND_LINE_ERROR); } if (options.boogieProgramPath == null) { Console.WriteLine("A boogie program must be specified. See --help"); ExitWith(ExitCode.COMMAND_LINE_ERROR); } if (!File.Exists(options.boogieProgramPath)) { Console.WriteLine("Boogie program \"" + options.boogieProgramPath + "\" does not exist"); ExitWith(ExitCode.COMMAND_LINE_ERROR); } Program program = null; if (options.Defines != null) { foreach (var define in options.Defines) { Console.WriteLine("Adding define \"" + define + "\" to Boogie parser"); } } int errors = Microsoft.Boogie.Parser.Parse(options.boogieProgramPath, options.Defines, out program); if (errors != 0) { Console.WriteLine("Failed to parse"); ExitWith(ExitCode.PARSE_ERROR); } errors = program.Resolve(); if (errors != 0) { Console.WriteLine("Failed to resolve."); ExitWith(ExitCode.RESOLVE_ERROR); } if (options.useModSetTransform > 0) { // This is useful for Boogie Programs produced by the GPUVerify tool that // have had instrumentation added that invalidates the modset attached to // procedures. By running the analysis we may modify the modsets attached to // procedures in the program to be correct so that Boogie's Type checker doesn't // produce an error. var modsetAnalyser = new ModSetCollector(); modsetAnalyser.DoModSetAnalysis(program); } errors = program.Typecheck(); if (errors != 0) { Console.WriteLine("Failed to Typecheck."); ExitWith(ExitCode.TYPECHECK_ERROR); } IStateScheduler scheduler = GetScheduler(options); // Limit Depth if necessary if (options.MaxDepth >= 0) { scheduler = new LimitExplicitDepthScheduler(scheduler, options.MaxDepth); Console.WriteLine("Using Depth limit:{0}", options.MaxDepth); } if (options.FailureLimit < 0) { Console.Error.WriteLine("FailureLimit must be >= 0"); ExitWith(ExitCode.COMMAND_LINE_ERROR); } Console.WriteLine("Using Scheduler: {0}", scheduler.ToString()); var nonSpeculativeterminationCounter = new TerminationCounter(TerminationCounter.CountType.ONLY_NON_SPECULATIVE); var speculativeTerminationCounter = new TerminationCounter(TerminationCounter.CountType.ONLY_SPECULATIVE); IExprBuilder builder = new SimpleExprBuilder(/*immutable=*/ true); ISymbolicPool symbolicPool = null; if (options.useSymbolicPoolCache > 0) { throw new Exception("DON'T USE THIS. IT'S BROKEN"); symbolicPool = new CachingSymbolicPool(); } else { symbolicPool = new SimpleSymbolicPool(); } Console.WriteLine("Using Symbolic Pool: {0}", symbolicPool.ToString()); if (options.useConstantFolding > 0) { if (options.ConstantCaching > 0) { Console.WriteLine("Using ConstantCachingExprBuilder"); builder = new ConstantCachingExprBuilder(builder); } builder = new ConstantFoldingExprBuilder(builder); } // Destroy the solver when we stop using it using (var solver = BuildSolverChain(options)) { Executor executor = new Executor(program, scheduler, solver, builder, symbolicPool); executor.ExecutorTimeoutReached += delegate(object sender, Executor.ExecutorTimeoutReachedArgs eventArgs) { TimeoutHit = true; // Record so we can set the exitcode appropriately later Console.Error.WriteLine("Timeout hit. Trying to kill Executor (may wait for solver)"); }; // Check all implementations exist and build list of entry points to execute var entryPoints = new List <Implementation>(); // This is specific to GPUVerify if (options.gpuverifyEntryPoints) { var kernels = program.TopLevelDeclarations.OfType <Implementation>().Where(impl => QKeyValue.FindBoolAttribute(impl.Attributes, "kernel")); foreach (var kernel in kernels) { entryPoints.Add(kernel); } if (entryPoints.Count() == 0) { Console.WriteLine("Could not find any kernel entry points"); ExitWith(ExitCode.ENTRY_POINT_NOT_FOUND_ERROR); } } else { // Set main as default. if (options.entryPoints == null) { options.entryPoints = new List <string>() { "main" } } ; foreach (var implString in options.entryPoints) { Implementation entry = program.TopLevelDeclarations.OfType <Implementation>().Where(i => i.Name == implString).FirstOrDefault(); if (entry == null) { Console.WriteLine("Could not find implementation \"" + implString + "\" to use as entry point"); ExitWith(ExitCode.ENTRY_POINT_NOT_FOUND_ERROR); } entryPoints.Add(entry); } } if (options.useInstructionPrinter) { Console.WriteLine("Installing instruction printer"); var instrPrinter = new InstructionPrinter(Console.Out); instrPrinter.Connect(executor); } if (options.useCallSequencePrinter) { Console.WriteLine("Installing call sequence printer"); var callPrinter = new CallPrinter(Console.Out); callPrinter.Connect(executor); } if (options.gotoAssumeLookAhead > 0) { executor.UseGotoLookAhead = true; } else { executor.UseGotoLookAhead = false; } if (options.ForkAtPredicatedAssign) { executor.UseForkAtPredicatedAssign = true; } if (options.CheckEntryRequires > 0) { executor.CheckEntryRequires = true; } else { Console.WriteLine("Warning: Requires at the entry point are not being checked"); executor.CheckEntryRequires = false; } if (options.CheckEntryAxioms > 0) { executor.CheckEntryAxioms = true; } else { Console.WriteLine("Warning: Axioms are not being checked"); executor.CheckEntryAxioms = false; } if (options.CheckUniqueVariableDecls > 0) { executor.CheckUniqueVariableDecls = true; } else { Console.WriteLine("Warning: Unique variables are not being checked"); executor.CheckUniqueVariableDecls = false; } if (options.GlobalDDE > 0) { executor.UseGlobalDDE = true; Console.WriteLine("WARNING: Using GlobalDDE. This may remove unsatisfiable axioms"); } else { executor.UseGlobalDDE = false; } // Just print a message about break points for now. executor.BreakPointReached += BreakPointPrinter.handleBreakPoint; // Write to the console about context changes var contextChangeReporter = new ContextChangedReporter(); contextChangeReporter.Connect(executor); var stateHandler = new TerminationConsoleReporter(); stateHandler.Connect(executor); nonSpeculativeterminationCounter.Connect(executor); speculativeTerminationCounter.Connect(executor); if (options.FileLogging > 0) { SetupFileLoggers(options, executor, solver); } SetupTerminationCatchers(executor); ApplyFilters(executor, options); if (options.FailureLimit > 0) { var failureLimiter = new FailureLimiter(options.FailureLimit); failureLimiter.Connect(executor); Console.WriteLine("Using failure limit of {0}", options.FailureLimit); } try { // Supply our own PassManager for preparation so we can hook into its events executor.PreparationPassManager = GetPassManager(options); foreach (var entryPoint in entryPoints) { Console.ForegroundColor = ConsoleColor.Cyan; Console.WriteLine("Entering Implementation " + entryPoint.Name + " as entry point"); Console.ResetColor(); executor.Run(entryPoint, options.timeout); } } catch (InitialStateTerminated) { if (options.CatchExceptions == 0) { throw; } Console.ForegroundColor = ConsoleColor.Red; Console.Error.WriteLine("The initial state terminated. Execution cannot continue"); Console.ResetColor(); ExitWith(ExitCode.INITIAL_STATE_TERMINATED); } catch (RecursiveFunctionDetectedException rfdException) { if (options.CatchExceptions == 0) { throw; } Console.ForegroundColor = ConsoleColor.Red; Console.Error.WriteLine("Detected the following recursive functions"); foreach (var function in rfdException.Functions) { Console.Error.Write(function.Name + ": "); if (function.Body != null) { Console.Error.WriteLine(function.Body.ToString()); } if (function.DefinitionAxiom != null) { Console.Error.WriteLine(function.DefinitionAxiom.Expr.ToString()); } } Console.ResetColor(); ExitWith(ExitCode.RECURSIVE_FUNCTIONS_FOUND_ERROR); } catch (OutOfMemoryException e) { if (options.CatchExceptions == 0) { throw; } Console.Error.WriteLine("Ran out of memory!"); Console.Error.WriteLine(e.ToString()); ExitWith(ExitCode.OUT_OF_MEMORY); } catch (NotImplementedException e) { if (options.CatchExceptions == 0) { throw; } Console.Error.WriteLine("Feature not implemented!"); Console.Error.WriteLine(e.ToString()); ExitWith(ExitCode.NOT_IMPLEMENTED_EXCEPTION); } catch (NotSupportedException e) { if (options.CatchExceptions == 0) { throw; } Console.Error.WriteLine("Feature not supported!"); Console.Error.WriteLine(e.ToString()); ExitWith(ExitCode.NOT_SUPPORTED_EXCEPTION); } Console.WriteLine("Finished executing"); DumpStats(executor, solver, nonSpeculativeterminationCounter, speculativeTerminationCounter); } if (TimeoutHit) { ExitWith(nonSpeculativeterminationCounter.NumberOfFailures > 0 ? ExitCode.ERRORS_TIMEOUT : ExitCode.NO_ERRORS_TIMEOUT); throw new InvalidOperationException("Unreachable"); } var exitCode = nonSpeculativeterminationCounter.NumberOfFailures > 0 ? ExitCode.ERRORS_NO_TIMEOUT : ExitCode.NO_ERRORS_NO_TIMEOUT; if (exitCode == ExitCode.NO_ERRORS_NO_TIMEOUT) { // If no errors were found we may need to pick a different exit code // because path exploration may not have been exhaustive due to speculative paths // or hitting a bound. This isn't perfect because we may hit a bound and have speculative // paths so we could use either exit code in this case. if (nonSpeculativeterminationCounter.DisallowedSpeculativePaths > 0 || speculativeTerminationCounter.NumberOfTerminatedStates > 0) { exitCode = ExitCode.NO_ERRORS_NO_TIMEOUT_BUT_FOUND_SPECULATIVE_PATHS; Console.WriteLine("NOTE: Bugs may have been missed!"); } else if (nonSpeculativeterminationCounter.DisallowedPathDepths > 0) { exitCode = ExitCode.NO_ERRORS_NO_TIMEOUT_BUT_HIT_BOUND; Console.WriteLine("NOTE: Bugs may have been missed!"); } } ExitWith(exitCode); return((int)exitCode); // This is required to keep the compiler happy. }
public void ModsetCache() { var prog = SymbooglixLibTests.SymbooglixTest.LoadProgramFrom(@" var g:int; var h:int; procedure main() modifies g, h; { g := 0; return; } ", "test.bpl"); // The Program needs to be annotated with ProgramLocations for this test to work var PM = new Symbooglix.Transform.PassManager(); PM.Add(new Symbooglix.Annotation.ProgramLocationAnnotater()); PM.Run(prog); var pool = new CachingSymbolicPool(); var proc = prog.TopLevelDeclarations.OfType <Procedure>().Where(p => p.Name == "main").First(); // Make a few ExecutionStates. We don't need to do anything with them, we are effectively using // them as a key into our data structure var state0 = MkExecutionState(); var state1 = state0.Clone(proc.GetModSetProgramLocation()); // HACK: Just use any old program location var state2 = state1.Clone(proc.GetModSetProgramLocation()); var gVars = new List <SymbolicVariable>(); var hVars = new List <SymbolicVariable>(); gVars.Add(pool.GetFreshSymbolic(proc, 0, state0)); gVars.Add(pool.GetFreshSymbolic(proc, 0, state1)); gVars.Add(pool.GetFreshSymbolic(proc, 0, state2)); hVars.Add(pool.GetFreshSymbolic(proc, 1, state0)); hVars.Add(pool.GetFreshSymbolic(proc, 1, state1)); hVars.Add(pool.GetFreshSymbolic(proc, 1, state2)); foreach (var sym in gVars) { Assert.IsNotNull(sym); Assert.AreSame(gVars[0], sym); } foreach (var sym in hVars) { Assert.IsNotNull(sym); Assert.AreSame(hVars[0], sym); } // Now State1 will ask for a new symbolic so it should get something new var gSymFirst = gVars[0]; gVars.Clear(); gVars.Add(pool.GetFreshSymbolic(proc, 0, state1)); gVars.Add(pool.GetFreshSymbolic(proc, 0, state0)); gVars.Add(pool.GetFreshSymbolic(proc, 0, state2)); Assert.AreNotSame(gSymFirst, gVars[0]); foreach (var sym in gVars) { Assert.IsNotNull(sym); Assert.AreSame(gVars[0], sym); } // Create a new state it should not get gSymFirst because even though it has never asked for a symbolic before // the cache should be aware it is a child of state 1 which has already been given "xSymFirst". var state3 = state1.Clone(proc.GetModSetProgramLocation()); // HACK: Use any old program location var state3Request = pool.GetFreshSymbolic(proc, 0, state3); Assert.AreNotSame(gSymFirst, state3Request); }