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//-----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All Rights Reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.IO;
using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
//using util;
using Microsoft.Boogie;
using Microsoft.Basetypes;
using Microsoft.Boogie.VCExprAST;
namespace Microsoft.Boogie.SMTLib
{
internal class FindLabelsVisitor : TraversingVCExprVisitor<bool, bool> {
public HashSet<string/*!*/>/*!*/ Labels = new HashSet<string/*!*/>();
[ContractInvariantMethod]
void ObjectInvariant() {
Contract.Invariant(cce.NonNull(Labels));
}
public static HashSet<string/*!*/>/*!*/ FindLabels(VCExpr/*!*/ expr) {
Contract.Requires(expr != null);
Contract.Ensures(cce.NonNull(Contract.Result<HashSet<string/*!*/>/*!*/>()));
FindLabelsVisitor visitor = new FindLabelsVisitor();
visitor.Traverse(expr, true);
return visitor.Labels;
}
protected override bool StandardResult(VCExpr node, bool arg) {
//Contract.Requires(node!=null);
VCExprNAry nary = node as VCExprNAry;
if (nary != null) {
VCExprLabelOp lab = nary.Op as VCExprLabelOp;
if (lab != null) {
Labels.Add(lab.label);
}
}
return true;
}
}
internal class Inspector {
[Rep] protected readonly Process inspector;
[Rep] readonly TextReader fromInspector;
[Rep] readonly TextWriter toInspector;
[ContractInvariantMethod]
void ObjectInvariant()
{
Contract.Invariant(inspector!=null);
Contract.Invariant(fromInspector!=null);
Contract.Invariant(toInspector != null);
}
public Inspector(SMTLibProverOptions opts)
{
Contract.Requires(opts != null);
ProcessStartInfo psi = new ProcessStartInfo(opts.Inspector);
Contract.Assert(psi!=null);
psi.CreateNoWindow = true;
psi.UseShellExecute = false;
psi.RedirectStandardInput = true;
psi.RedirectStandardOutput = true;
psi.RedirectStandardError = false;
try
{
Process inspector = Process.Start(psi);
this.inspector = inspector;
fromInspector = inspector.StandardOutput;
toInspector = inspector.StandardInput;
}
catch (System.ComponentModel.Win32Exception e)
{
throw new Exception(string.Format("Unable to start the inspector process {0}: {1}", opts.Inspector, e.Message));
}
}
public void NewProblem(string descriptiveName, VCExpr vc, ProverInterface.ErrorHandler handler)
{
Contract.Requires(descriptiveName != null);
Contract.Requires(vc != null);
Contract.Requires(handler != null);
HashSet<string/*!*/>/*!*/ labels = FindLabelsVisitor.FindLabels(vc);
Contract.Assert(labels!=null);
toInspector.WriteLine("PROBLEM " + descriptiveName);
toInspector.WriteLine("TOKEN BEGIN");
foreach (string lab in labels) {
Contract.Assert(lab!=null);
string no = lab.Substring(1);
Absy absy = handler.Label2Absy(no);
IToken tok = absy.tok;
AssertCmd assrt = absy as AssertCmd;
Block blk = absy as Block;
string val = tok.val; // might require computation, so cache it
if (val == "foo" || tok.filename == null) continue; // no token
toInspector.Write("TOKEN ");
toInspector.Write(lab);
toInspector.Write(" ");
if (assrt != null) {
toInspector.Write("ASSERT");
string errData = assrt.ErrorData as string;
if (errData != null) {
val = errData;
} else if (assrt.ErrorMessage != null) {
val = assrt.ErrorMessage;
}
} else if (blk != null) {
toInspector.Write("BLOCK ");
toInspector.Write(blk.Label);
} else {
Contract.Assume( false);
}
if (val == null || val == "assert" || val == "ensures") { val = ""; }
if (absy is LoopInitAssertCmd) {
val += " (loop entry)";
} else if (absy is LoopInvMaintainedAssertCmd) {
val += " (loop body)";
} else if (val.IndexOf("#VCCERR") >= 0) {
// skip further transformations
} else if (absy is AssertRequiresCmd) {
AssertRequiresCmd req = (AssertRequiresCmd)absy;
IToken t2 = req.Requires.tok;
string tval = t2.val;
if (tval == "requires")
tval = string.Format("{0}({1},{2}))", t2.filename, t2.line, t2.col);
string call = "";
if (val != "call") call = " in call to " + val;
val = string.Format("precondition {0}{1}", tval, call);
}
val = val.Replace("\r", "").Replace("\n", " ");
toInspector.WriteLine(string.Format(" {0} {1} :@:{2}:@:{3}", tok.line, tok.col, tok.filename, val));
}
toInspector.WriteLine("TOKEN END");
}
public void StatsLine(string line)
{
Contract.Requires(line != null);
toInspector.WriteLine(line);
toInspector.Flush();
}
}
}
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