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//-----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All Rights Reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using System.Diagnostics.Contracts;
using Microsoft.Basetypes;
namespace Microsoft.Boogie {
public class ProverOptions {
public class OptionException : Exception {
public OptionException(string msg)
: base(msg) {
Contract.Requires(msg != null);
}
}
public string/*?*/ LogFilename = null;
public bool AppendLogFile = false;
public bool SeparateLogFiles = false;
// Say (DBG_WAS_VALID) or (DBG_WAS_INVALID) after query
public bool ForceLogStatus = false;
public int TimeLimit = 0;
public int MemoryLimit = 0;
public int Verbosity = 0;
public string ProverPath;
private string/*!*/ stringRepr = "";
[ContractInvariantMethod]
void ObjectInvariant() {
Contract.Invariant(stringRepr != null);
}
[Pure]
public override string ToString() {
Contract.Ensures(Contract.Result<string>() != null);
return stringRepr;
}
// The usual thing to override.
protected virtual bool Parse(string opt) {
Contract.Requires(opt != null);
return ParseString(opt, "LOG_FILE", ref LogFilename) ||
ParseBool(opt, "APPEND_LOG_FILE", ref AppendLogFile) ||
ParseBool(opt, "FORCE_LOG_STATUS", ref ForceLogStatus) ||
ParseInt(opt, "MEMORY_LIMIT", ref MemoryLimit) ||
ParseInt(opt, "VERBOSITY", ref Verbosity) ||
ParseInt(opt, "TIME_LIMIT", ref TimeLimit) ||
ParseString(opt, "PROVER_PATH", ref ProverPath);
// || base.Parse(opt)
}
public virtual string Help
{
get
{
return
@"
Generic prover options :
~~~~~~~~~~~~~~~~~~~~~~~
LOG_FILE=<string> Log input for the theorem prover. The string @PROC@ in the filename
causes there to be one prover log file per verification condition,
and is expanded to the name of the procedure that the verification
condition is for.
APPEND_LOG_FILE=<bool> Append, rather than overwrite the log file.
MEMORY_LIMIT=<int> Memory limit of the prover in megabytes.
VERBOSITY=<int> The higher, the more verbose.
TIME_LIMIT=<int> Time limit per verification condition in miliseconds.
PROVER_PATH=<string> Path to the prover to use.
The generic options may or may not be used by the prover plugin.
";
}
}
public virtual void Parse(IEnumerable<string/*!*/>/*!*/ opts) {
Contract.Requires(cce.NonNullElements(opts));
StringBuilder sb = new StringBuilder(stringRepr);
Contract.Assert(sb != null);
foreach (string/*!*/ opt in opts) {
Contract.Assert(opt != null);
if (!Parse(opt)) {
ReportError("Unrecognised prover option: " + opt);
}
sb.Append(opt).Append(" ");
}
stringRepr = sb.ToString();
PostParse();
}
public virtual void PostParse() {
if (LogFilename != null && LogFilename.Contains("@PROC@")) {
SeparateLogFiles = true;
}
}
protected void ReportError(string msg) {
Contract.Requires(msg != null);
throw new OptionException(msg + "\n\n" + Help);
}
protected virtual bool ParseString(string opt, string name, ref string field) {
Contract.Requires(name != null);
Contract.Requires(opt != null);
if (opt.Length >= name.Length && opt.StartsWith(name)) {
if (opt.Length == name.Length) {
field = "";
return true;
} else if (opt[name.Length] == '=' || opt[name.Length] == ':') {
field = opt.Substring(name.Length + 1);
return true;
}
}
return false;
}
protected virtual bool ParseBool(string opt, string name, ref bool field) {
Contract.Requires(name != null);
Contract.Requires(opt != null);
string tmp = null;
if (ParseString(opt, name, ref tmp))
switch (cce.NonNull(tmp).ToLower()) {
case "1":
case "true":
case "":
field = true;
return true;
case "0":
case "false":
field = false;
return true;
default:
ReportError("Invalid Boolean option \"" + opt + "\"");
return false;
}
return false;
}
protected virtual bool ParseInt(string opt, string name, ref int field) {
Contract.Requires(name != null);
Contract.Requires(opt != null);
string tmp = null;
int t2;
if (ParseString(opt, name, ref tmp)) {
if (int.TryParse(cce.NonNull(tmp), out t2)) {
field = t2;
return true;
} else {
ReportError("Invalid integer option \"" + opt + "\"");
}
}
return false;
}
public virtual TextWriter OpenLog(string/*?*/ descName) {
if (LogFilename != null) {
string filename = LogFilename;
Contract.Assert(filename != null);
if (descName != null)
filename = Helpers.SubstituteAtPROC(descName, filename);
return new StreamWriter(filename, AppendLogFile);
} else {
return null;
}
}
}
[ContractClass(typeof(ProverFactoryContracts))]
public abstract class ProverFactory {
// Really returns ProverInterface.
//public abstract object! SpawnProver(ProverOptions! options, object! ctxt);
public abstract object SpawnProver(ProverOptions options, object ctxt);
// Really returns ProverContext
public abstract object/*!*/ NewProverContext(ProverOptions/*!*/ options);
public virtual ProverOptions BlankProverOptions() {
Contract.Ensures(Contract.Result<ProverOptions>() != null);
return new ProverOptions();
}
// return true if the prover supports DAG AST as opposed to LET AST
public virtual bool SupportsDags {
get {
return false;
}
}
public virtual CommandLineOptions.VCVariety DefaultVCVariety {
get {
Contract.Ensures(Contract.Result<CommandLineOptions.VCVariety>() != CommandLineOptions.VCVariety.Unspecified);
return CommandLineOptions.VCVariety.DagIterative;
}
}
public virtual bool SupportsLabels(ProverOptions options) {
return true;
}
public virtual void Close() {
}
public static ProverFactory Load(string proverName) {
Contract.Requires(proverName != null);
Contract.Ensures(Contract.Result<ProverFactory>() != null);
Contract.Ensures(cce.IsNew(Contract.Result<ProverFactory>()) && cce.Owner.New(Contract.Result<ProverFactory>()));
string/*!*/ path;
if (proverName.IndexOf("/") > 0 || proverName.IndexOf("\\") > 0) {
path = proverName;
} else {
string codebase = cce.NonNull(System.IO.Path.GetDirectoryName(
cce.NonNull(System.Reflection.Assembly.GetExecutingAssembly().Location)));
path = System.IO.Path.Combine(codebase, "Provers." + proverName + ".dll");
}
Assembly asm = cce.NonNull(Assembly.LoadFrom(path));
string name = cce.NonNull(asm.GetName().Name);
System.Type factoryType = cce.NonNull(asm.GetType("Microsoft.Boogie." + name.Replace("Provers.", "") + ".Factory"));
return cce.NonNull((ProverFactory/*!*/)Activator.CreateInstance(factoryType));
}
}
[ContractClassFor(typeof(ProverFactory))]
public abstract class ProverFactoryContracts : ProverFactory {
public override object NewProverContext(ProverOptions options) {
Contract.Requires(options != null);
Contract.Ensures(Contract.Result<object>() != null);
throw new NotImplementedException();
}
}
}
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