diff options
Diffstat (limited to 'Source/BoogieDriver/BoogieDriver.ssc')
| -rw-r--r-- | Source/BoogieDriver/BoogieDriver.ssc | 648 |
1 files changed, 648 insertions, 0 deletions
diff --git a/Source/BoogieDriver/BoogieDriver.ssc b/Source/BoogieDriver/BoogieDriver.ssc new file mode 100644 index 00000000..0254c3ef --- /dev/null +++ b/Source/BoogieDriver/BoogieDriver.ssc @@ -0,0 +1,648 @@ +//-----------------------------------------------------------------------------
+//
+// Copyright (C) Microsoft Corporation. All Rights Reserved.
+//
+//-----------------------------------------------------------------------------
+//---------------------------------------------------------------------------------------------
+// OnlyBoogie OnlyBoogie.ssc
+// - main program for taking a BPL program and verifying it
+//---------------------------------------------------------------------------------------------
+
+namespace Microsoft.Boogie
+{
+ using System;
+ using System.IO;
+ using System.Collections;
+ using System.Collections.Generic;
+ using PureCollections;
+ using Microsoft.Boogie;
+ using Microsoft.Boogie.AbstractInterpretation;
+ using System.Diagnostics;
+ using VC;
+ using Cci = System.Compiler;
+ using AI = Microsoft.AbstractInterpretationFramework;
+
+/*
+ The following assemblies are referenced because they are needed at runtime, not at compile time:
+ BaseTypes
+ Provers.Z3
+ System.Compiler.Framework
+*/
+
+ public class OnlyBoogie
+ {
+ // ------------------------------------------------------------------------
+ // Main
+
+ public static void Main (string[]! args)
+ {
+ assert forall{int i in (0:args.Length); args[i] != null};
+ CommandLineOptions.Clo.RunningBoogieFromCommandLine = true;
+ if (CommandLineOptions.Clo.Parse(args) != 1)
+ {
+ goto END;
+ }
+ if (CommandLineOptions.Clo.Files.Count == 0)
+ {
+ ErrorWriteLine("*** Error: No input files were specified.");
+ goto END;
+ }
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ string errMsg = CommandLineOptions.Clo.XmlSink.Open();
+ if (errMsg != null) {
+ ErrorWriteLine("*** Error: " + errMsg);
+ goto END;
+ }
+ }
+ if (!CommandLineOptions.Clo.DontShowLogo)
+ {
+ Console.WriteLine(CommandLineOptions.Clo.Version);
+ }
+ if (CommandLineOptions.Clo.ShowEnv == CommandLineOptions.ShowEnvironment.Always)
+ {
+ Console.WriteLine("---Command arguments");
+ foreach (string! arg in args)
+ {
+ Console.WriteLine(arg);
+ }
+ Console.WriteLine("--------------------");
+ }
+
+ SelectPlatform(CommandLineOptions.Clo);
+
+ Helpers.ExtraTraceInformation("Becoming sentinent");
+
+ // Make sure the Spec# runtime is initialized.
+ // This happens when the static constructor for the Runtime type is executed.
+ // Otherwise, if a reference happens to get chased to it, it is loaded twice
+ // and then the types in it do not get unique representations.
+ if (System.Type.GetType("Mono.Runtime") == null) { // MONO
+ Cci.AssemblyNode a = Microsoft.SpecSharp.Runtime.RuntimeAssembly;
+ assert a != null;
+ }
+
+ foreach (string! file in CommandLineOptions.Clo.Files)
+ {
+ string extension = Path.GetExtension(file);
+ if (extension != null) { extension = extension.ToLower(); }
+ if (extension != ".bpl")
+ {
+ ErrorWriteLine("*** Error: '{0}': Filename extension '{1}' is not supported. Input files must be BoogiePL programs (.bpl).", file,
+ extension == null ? "" : extension);
+ goto END;
+ }
+ }
+ CommandLineOptions.Clo.RunningBoogieOnSsc = false;
+ ProcessFiles(CommandLineOptions.Clo.Files);
+
+ END:
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.Close();
+ }
+ if (CommandLineOptions.Clo.Wait)
+ {
+ Console.WriteLine("Press Enter to exit.");
+ Console.ReadLine();
+ }
+ }
+
+ public static void ErrorWriteLine(string! s) {
+ if (!s.Contains("Error: ") && !s.Contains("Error BP")) {
+ Console.WriteLine(s);
+ return;
+ }
+
+ // split the string up into its first line and the remaining lines
+ string remaining = null;
+ int i = s.IndexOf('\r');
+ if (0 <= i) {
+ remaining = s.Substring(i+1);
+ if (remaining.StartsWith("\n")) {
+ remaining = remaining.Substring(1);
+ }
+ s = s.Substring(0, i);
+ }
+
+ ConsoleColor col = Console.ForegroundColor;
+ Console.ForegroundColor = ConsoleColor.Red;
+ Console.WriteLine(s);
+ Console.ForegroundColor = col;
+
+ if (remaining != null) {
+ Console.WriteLine(remaining);
+ }
+ }
+
+ public static void ErrorWriteLine(string! format, params object[] args) {
+ string s = string.Format(format, args);
+ ErrorWriteLine(s);
+ }
+
+ public static void AdvisoryWriteLine(string! format, params object[] args) {
+ ConsoleColor col = Console.ForegroundColor;
+ Console.ForegroundColor = ConsoleColor.Yellow;
+ Console.WriteLine(format, args);
+ Console.ForegroundColor = col;
+ }
+
+ public static void SelectPlatform(CommandLineOptions! options)
+ {
+ if (options.TargetPlatformLocation != null) {
+ // Make sure static constructor runs before we start setting locations, etc.
+ System.Compiler.SystemTypes.Clear();
+
+ switch (options.TargetPlatform){
+ case CommandLineOptions.PlatformType.v1: Microsoft.SpecSharp.TargetPlatform.SetToV1(options.TargetPlatformLocation); break;
+ case CommandLineOptions.PlatformType.v11: Microsoft.SpecSharp.TargetPlatform.SetToV1_1(options.TargetPlatformLocation); break;
+ case CommandLineOptions.PlatformType.v2: Microsoft.SpecSharp.TargetPlatform.SetToV2(options.TargetPlatformLocation); break;
+ case CommandLineOptions.PlatformType.cli1: Microsoft.SpecSharp.TargetPlatform.SetToPostV1_1(options.TargetPlatformLocation); break;
+ }
+
+ if (options.StandardLibraryLocation != null && options.StandardLibraryLocation.Length > 0){
+ System.Compiler.SystemAssemblyLocation.Location = options.StandardLibraryLocation;
+ }
+ System.Compiler.SystemCompilerRuntimeAssemblyLocation.Location = options.TargetPlatformLocation + @"\System.Compiler.Runtime.dll";
+
+ System.Compiler.SystemTypes.Initialize(true, true);
+ }
+ }
+
+ static string! GetErrorLine(Cci.ErrorNode! node)
+ requires node.SourceContext.Document != null ==> node.SourceContext.Document.Name != null;
+ {
+ string message = node.GetMessage(System.Threading.Thread.CurrentThread.CurrentUICulture);
+ string kind;
+ if (message.Contains("(trace position)")) {
+ kind = "Related information";
+ } else {
+ kind = "Error";
+ }
+ if (node.SourceContext.Document != null) {
+ return string.Format("{0}({1},{2}): {3}: {4}", Path.GetFileName((!)node.SourceContext.Document.Name), node.SourceContext.StartLine, node.SourceContext.StartColumn, kind, message);
+ } else {
+ return string.Format("{0}: {1}", kind, message);
+ }
+ }
+
+ enum FileType { Unknown, Cil, Bpl, Dafny };
+
+ class ErrorReporter
+ {
+ public Cci.ErrorNodeList! errors = new Cci.ErrorNodeList();
+ public int errorsReported;
+
+ public void ReportErrors()
+ {
+ //sort the portion of the array that will be reported to make output more deterministic
+ errors.Sort(errorsReported,errors.Count-errorsReported);
+ for(;errorsReported < errors.Count; errorsReported++) {
+ Cci.ErrorNode error = errors[errorsReported];
+ if (error != null)
+ ErrorWriteLine(GetErrorLine(error));
+ }
+ }
+ }
+
+ static void ProcessFiles (List<string!>! fileNames)
+ {
+ using (XmlFileScope xf = new XmlFileScope(CommandLineOptions.Clo.XmlSink, fileNames[fileNames.Count-1])) {
+ BoogiePL.Errors.count = 0;
+ Program program = ParseBoogieProgram(fileNames, false);
+ if (program == null) return;
+ if (CommandLineOptions.Clo.PrintFile != null) {
+ PrintBplFile(CommandLineOptions.Clo.PrintFile, program, false);
+ }
+
+ PipelineOutcome oc = ResolveAndTypecheck(program, fileNames[fileNames.Count-1]);
+ if (oc != PipelineOutcome.ResolvedAndTypeChecked) return;
+ BoogiePL.Errors.count = 0;
+ int errorCount, verified, inconclusives, timeOuts, outOfMemories;
+ oc = InferAndVerify(program, null, out errorCount, out verified, out inconclusives, out timeOuts, out outOfMemories);
+ switch (oc) {
+ case PipelineOutcome.Done:
+ case PipelineOutcome.VerificationCompleted:
+ WriteTrailer(verified, errorCount, inconclusives, timeOuts, outOfMemories);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+
+ static void PrintBplFile (string! filename, Program! program, bool allowPrintDesugaring)
+ {
+ bool oldPrintDesugaring = CommandLineOptions.Clo.PrintDesugarings;
+ if (!allowPrintDesugaring) {
+ CommandLineOptions.Clo.PrintDesugarings = false;
+ }
+ using (TokenTextWriter writer = filename == "-" ?
+ new TokenTextWriter("<console>", Console.Out) :
+ new TokenTextWriter(filename))
+ {
+ if (CommandLineOptions.Clo.ShowEnv != CommandLineOptions.ShowEnvironment.Never) {
+ writer.WriteLine("// " + CommandLineOptions.Clo.Version);
+ writer.WriteLine("// " + CommandLineOptions.Clo.Environment);
+ }
+ writer.WriteLine();
+ program.Emit(writer);
+ }
+ CommandLineOptions.Clo.PrintDesugarings = oldPrintDesugaring;
+ }
+
+
+ static bool ProgramHasDebugInfo (Program! program)
+ {
+ // We inspect the last declaration because the first comes from the prelude and therefore always has source context.
+ return program.TopLevelDeclarations.Count > 0 &&
+ ((!)program.TopLevelDeclarations[program.TopLevelDeclarations.Count - 1]).tok.IsValid;
+ }
+
+
+ /// <summary>
+ /// Inform the user about something and proceed with translation normally.
+ /// Print newline after the message.
+ /// </summary>
+ public static void Inform(string s) {
+ if ( ! CommandLineOptions.Clo.Trace) { return; }
+ Console.WriteLine(s);
+ }
+
+ static void WriteTrailer(int verified, int errors, int inconclusives, int timeOuts, int outOfMemories)
+ requires 0 <= errors && 0 <= inconclusives && 0 <= timeOuts && 0 <= outOfMemories;
+ {
+ Console.WriteLine();
+ Console.Write("{0} finished with {1} verified, {2} error{3}", CommandLineOptions.Clo.ToolName, verified, errors, errors == 1 ? "" : "s");
+ if (inconclusives != 0) {
+ Console.Write(", {0} inconclusive{1}", inconclusives, inconclusives == 1 ? "" : "s");
+ }
+ if (timeOuts != 0) {
+ Console.Write(", {0} time out{1}", timeOuts, timeOuts == 1 ? "" : "s");
+ }
+ if (outOfMemories != 0) {
+ Console.Write(", {0} out of memory", outOfMemories);
+ }
+ Console.WriteLine();
+ Console.Out.Flush();
+ }
+
+
+
+ static void ReportBplError(Absy! node, string! message, bool error, bool showBplLocation)
+ {
+ IToken tok = node.tok;
+ string s;
+ if (tok != null && showBplLocation) {
+ s = string.Format("{0}({1},{2}): {3}", tok.filename, tok.line, tok.col, message);
+ } else {
+ s = message;
+ }
+ if (error) {
+ ErrorWriteLine(s);
+ } else {
+ Console.WriteLine(s);
+ }
+ }
+
+ /// <summary>
+ /// Parse the given files into one Boogie program. If an I/O or parse error occurs, an error will be printed
+ /// and null will be returned. On success, a non-null program is returned.
+ /// </summary>
+ static Program ParseBoogieProgram(List<string!>! fileNames, bool suppressTraceOutput)
+ {
+ BoogiePL.Errors.count = 0;
+ Program program = null;
+ bool okay = true;
+ foreach (string bplFileName in fileNames) {
+ if (!suppressTraceOutput) {
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteFileFragment(bplFileName);
+ }
+ if (CommandLineOptions.Clo.Trace) {
+ Console.WriteLine("Parsing " + bplFileName);
+ }
+ }
+
+ Program programSnippet;
+ int errorCount;
+ try {
+ errorCount = BoogiePL.Parser.Parse(bplFileName, out programSnippet);
+ if (programSnippet == null || errorCount != 0) {
+ Console.WriteLine("{0} parse errors detected in {1}", BoogiePL.Errors.count, bplFileName);
+ okay = false;
+ continue;
+ }
+ } catch (IOException e) {
+ ErrorWriteLine("Error opening file \"{0}\": {1}", bplFileName, e.Message);
+ okay = false;
+ continue;
+ }
+ if (program == null) {
+ program = programSnippet;
+ } else if (programSnippet != null) {
+ program.TopLevelDeclarations.AddRange(programSnippet.TopLevelDeclarations);
+ }
+ }
+ if (!okay) {
+ return null;
+ } else if (program == null) {
+ return new Program();
+ } else {
+ return program;
+ }
+ }
+
+
+ enum PipelineOutcome { Done, ResolutionError, TypeCheckingError, ResolvedAndTypeChecked, FatalError, VerificationCompleted }
+
+ /// <summary>
+ /// Resolves and type checks the given Boogie program. Any errors are reported to the
+ /// console. Returns:
+ /// - Done if no errors occurred, and command line specified no resolution or no type checking.
+ /// - ResolutionError if a resolution error occurred
+ /// - TypeCheckingError if a type checking error occurred
+ /// - ResolvedAndTypeChecked if both resolution and type checking succeeded
+ /// </summary>
+ static PipelineOutcome ResolveAndTypecheck (Program! program, string! bplFileName)
+ {
+ // ---------- Resolve ------------------------------------------------------------
+
+ if (CommandLineOptions.Clo.NoResolve) { return PipelineOutcome.Done; }
+
+ int errorCount = program.Resolve();
+ if (errorCount != 0) {
+ Console.WriteLine("{0} name resolution errors detected in {1}", errorCount, bplFileName);
+ return PipelineOutcome.ResolutionError;
+ }
+
+ // ---------- Type check ------------------------------------------------------------
+
+ if (CommandLineOptions.Clo.NoTypecheck) { return PipelineOutcome.Done; }
+
+ errorCount = program.Typecheck();
+ if (errorCount != 0) {
+ Console.WriteLine("{0} type checking errors detected in {1}", errorCount, bplFileName);
+ return PipelineOutcome.TypeCheckingError;
+ }
+
+ if (CommandLineOptions.Clo.PrintFile != null && CommandLineOptions.Clo.PrintDesugarings)
+ {
+ // if PrintDesugaring option is engaged, print the file here, after resolution and type checking
+ PrintBplFile(CommandLineOptions.Clo.PrintFile, program, true);
+ }
+
+ return PipelineOutcome.ResolvedAndTypeChecked;
+ }
+
+ /// <summary>
+ /// Given a resolved and type checked Boogie program, infers invariants for the program
+ /// and then attempts to verify it. Returns:
+ /// - Done if command line specified no verification
+ /// - FatalError if a fatal error occurred, in which case an error has been printed to console
+ /// - VerificationCompleted if inference and verification completed, in which the out
+ /// parameters contain meaningful values
+ /// </summary>
+ static PipelineOutcome InferAndVerify (Program! program,
+ ErrorReporter errorReporter,
+ out int errorCount, out int verified, out int inconclusives, out int timeOuts, out int outOfMemories)
+ ensures 0 <= inconclusives && 0 <= timeOuts;
+ {
+ errorCount = verified = inconclusives = timeOuts = outOfMemories = 0;
+
+ // ---------- Infer invariants --------------------------------------------------------
+
+ // Abstract interpretation -> Always use (at least) intervals, if not specified otherwise (e.g. with the "/noinfer" switch)
+ Microsoft.Boogie.AbstractInterpretation.AbstractInterpretation.RunAbstractInterpretation(program);
+
+ if (CommandLineOptions.Clo.LoopUnrollCount != -1) {
+ program.UnrollLoops(CommandLineOptions.Clo.LoopUnrollCount);
+ }
+
+ if (CommandLineOptions.Clo.PrintInstrumented) {
+ program.Emit(new TokenTextWriter(Console.Out));
+ }
+
+ // ---------- Verify ------------------------------------------------------------
+
+ if (!CommandLineOptions.Clo.Verify) { return PipelineOutcome.Done; }
+
+ #region Verify each implementation
+
+#if ROB_DEBUG
+ string now = DateTime.Now.ToString().Replace(' ','-').Replace('/','-').Replace(':','-');
+ System.IO.StreamWriter w = new System.IO.StreamWriter(@"\temp\batch_"+now+".bpl");
+ program.Emit(new TokenTextWriter(w));
+ w.Close();
+#endif
+
+ ConditionGeneration vcgen = null;
+ try
+ {
+ if (CommandLineOptions.Clo.vcVariety == CommandLineOptions.VCVariety.Doomed)
+ {
+ vcgen = new DCGen(program, CommandLineOptions.Clo.SimplifyLogFilePath, CommandLineOptions.Clo.SimplifyLogFileAppend);
+ } else
+ {
+ vcgen = new VCGen(program, CommandLineOptions.Clo.SimplifyLogFilePath, CommandLineOptions.Clo.SimplifyLogFileAppend);
+ }
+ }
+ catch (ProverException e)
+ {
+ ErrorWriteLine("Fatal Error: ProverException: {0}", e);
+ return PipelineOutcome.FatalError;
+ }
+
+ foreach ( Declaration! decl in program.TopLevelDeclarations )
+ {
+ Implementation impl = decl as Implementation;
+ if (impl != null && CommandLineOptions.Clo.UserWantsToCheckRoutine((!)impl.Name) && !impl.SkipVerification) {
+ List<Counterexample!>? errors;
+
+ DateTime start = new DateTime(); // to please compiler's definite assignment rules
+ if (CommandLineOptions.Clo.Trace || CommandLineOptions.Clo.XmlSink != null) {
+ start = DateTime.Now;
+ if (CommandLineOptions.Clo.Trace) {
+ Console.WriteLine();
+ Console.WriteLine("Verifying {0} ...", impl.Name);
+ }
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteStartMethod(impl.Name, start);
+ }
+ }
+
+ VCGen.Outcome outcome;
+ try
+ {
+ outcome = vcgen.VerifyImplementation(impl, program, out errors);
+ }
+ catch (VCGenException e)
+ {
+ ReportBplError(impl, String.Format("Error BP5010: {0} Encountered in implementation {1}.", e.Message, impl.Name), true, true);
+ errors = null;
+ outcome = VCGen.Outcome.Inconclusive;
+ }
+ catch (UnexpectedProverOutputException upo)
+ {
+ AdvisoryWriteLine("Advisory: {0} SKIPPED because of internal error: unexpected prover output: {1}", impl.Name, upo.Message);
+ errors = null;
+ outcome = VCGen.Outcome.Inconclusive;
+ }
+
+ string! timeIndication = "";
+ DateTime end = DateTime.Now;
+ TimeSpan elapsed = end - start;
+ if (CommandLineOptions.Clo.Trace || CommandLineOptions.Clo.XmlSink != null) {
+ if (CommandLineOptions.Clo.Trace) {
+ timeIndication = string.Format(" [{0} s] ", elapsed.TotalSeconds);
+ }
+ }
+
+
+ switch (outcome) {
+ default:
+ assert false; // unexpected outcome
+ case VCGen.Outcome.Correct:
+ if (CommandLineOptions.Clo.vcVariety == CommandLineOptions.VCVariety.Doomed) {
+ Inform(String.Format("{0}doomed", timeIndication));
+ errorCount++;
+ } else {
+ Inform(String.Format("{0}verified", timeIndication));
+ verified++;
+ }
+ break;
+ case VCGen.Outcome.TimedOut:
+ timeOuts++;
+ Inform(String.Format("{0}timed out", timeIndication));
+ break;
+ case VCGen.Outcome.OutOfMemory:
+ outOfMemories++;
+ Inform(String.Format("{0}out of memory", timeIndication));
+ break;
+ case VCGen.Outcome.Inconclusive:
+ inconclusives++;
+ Inform(String.Format("{0}inconclusive", timeIndication));
+ break;
+ case VCGen.Outcome.Errors:
+ if (CommandLineOptions.Clo.vcVariety == CommandLineOptions.VCVariety.Doomed) {
+ Inform(String.Format("{0}credible", timeIndication));
+ verified++;
+ } else {
+ assert errors != null; // guaranteed by postcondition of VerifyImplementation
+ if (errorReporter != null)
+ {
+ // assert translatedProgram != null;
+ // ErrorReporting h = new ErrorReporting();
+ // h.errorReportingWithTrace(translatedProgram, errors, impl);
+
+ errorReporter.ReportErrors();
+ }
+ else
+ {
+ // BP1xxx: Parsing errors
+ // BP2xxx: Name resolution errors
+ // BP3xxx: Typechecking errors
+ // BP4xxx: Abstract interpretation errors (Is there such a thing?)
+ // BP5xxx: Verification errors
+
+ errors.Sort(new CounterexampleComparer());
+ foreach (Counterexample error in errors)
+ {
+ if (error is CallCounterexample)
+ {
+ CallCounterexample! err = (CallCounterexample) error;
+ if (!CommandLineOptions.Clo.ForceBplErrors && err.FailingRequires.ErrorMessage != null) {
+ ReportBplError(err.FailingRequires, err.FailingRequires.ErrorMessage, true, false);
+ } else {
+ ReportBplError(err.FailingCall, "Error BP5002: A precondition for this call might not hold.", true, true);
+ ReportBplError(err.FailingRequires, "Related location: This is the precondition that might not hold.", false, true);
+ }
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteError("precondition violation", err.FailingCall.tok, err.FailingRequires.tok, error.Trace);
+ }
+ }
+ else if (error is ReturnCounterexample)
+ {
+ ReturnCounterexample! err = (ReturnCounterexample) error;
+ if (!CommandLineOptions.Clo.ForceBplErrors && err.FailingEnsures.ErrorMessage != null) {
+ ReportBplError(err.FailingEnsures, err.FailingEnsures.ErrorMessage, true, false);
+ } else {
+ ReportBplError(err.FailingReturn, "Error BP5003: A postcondition might not hold at this return statement.", true, true);
+ ReportBplError(err.FailingEnsures, "Related location: This is the postcondition that might not hold.", false, true);
+ }
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteError("postcondition violation", err.FailingReturn.tok, err.FailingEnsures.tok, error.Trace);
+ }
+ }
+ else // error is AssertCounterexample
+ {
+ AssertCounterexample! err = (AssertCounterexample) error;
+ if (err.FailingAssert is LoopInitAssertCmd) {
+ ReportBplError(err.FailingAssert, "Error BP5004: This loop invariant might not hold on entry.", true, true);
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteError("loop invariant entry violation", err.FailingAssert.tok, null, error.Trace);
+ }
+ }
+ else if (err.FailingAssert is LoopInvMaintainedAssertCmd) {
+ // this assertion is a loop invariant which is not maintained
+ ReportBplError(err.FailingAssert, "Error BP5005: This loop invariant might not be maintained by the loop.", true, true);
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteError("loop invariant maintenance violation", err.FailingAssert.tok, null, error.Trace);
+ }
+ } else {
+ if (!CommandLineOptions.Clo.ForceBplErrors && err.FailingAssert.ErrorMessage != null) {
+ ReportBplError(err.FailingAssert, err.FailingAssert.ErrorMessage, true, false);
+ } else if (err.FailingAssert.ErrorData is string) {
+ ReportBplError(err.FailingAssert, (string)err.FailingAssert.ErrorData, true, true);
+ } else {
+ ReportBplError(err.FailingAssert, "Error BP5001: This assertion might not hold.", true, true);
+ }
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteError("assertion violation", err.FailingAssert.tok, null, error.Trace);
+ }
+ }
+ }
+ if (CommandLineOptions.Clo.EnhancedErrorMessages == 1) {
+ foreach (string! info in error.relatedInformation) {
+ Console.WriteLine(" " + info);
+ }
+ }
+ if (CommandLineOptions.Clo.ErrorTrace > 0) {
+ Console.WriteLine("Execution trace:");
+ foreach (Block! b in error.Trace) {
+ if (b.tok == null) {
+ Console.WriteLine(" <intermediate block>");
+ } else {
+ // for ErrorTrace == 1 restrict the output;
+ // do not print tokens with -17:-4 as their location because they have been
+ // introduced in the translation and do not give any useful feedback to the user
+ if (!(CommandLineOptions.Clo.ErrorTrace == 1 && b.tok.line == -17 && b.tok.col == -4)) {
+ Console.WriteLine(" {0}({1},{2}): {3}", b.tok.filename, b.tok.line, b.tok.col, b.Label);
+ }
+ }
+ }
+ }
+ errorCount++;
+ }
+ }
+ Inform(String.Format("{0}error{1}", timeIndication, errors.Count == 1 ? "" : "s"));
+ }
+ break;
+ }
+ if (CommandLineOptions.Clo.XmlSink != null) {
+ CommandLineOptions.Clo.XmlSink.WriteEndMethod(outcome.ToString().ToLowerInvariant(), end, elapsed);
+ }
+ if (outcome == VCGen.Outcome.Errors || CommandLineOptions.Clo.Trace) {
+ Console.Out.Flush();
+ }
+ }
+ }
+ vcgen.Close();
+ ((!)CommandLineOptions.Clo.TheProverFactory).Close();
+
+ #endregion
+
+ return PipelineOutcome.VerificationCompleted;
+ }
+
+ }
+}
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