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using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using System.IO;
using System.Diagnostics;
using Microsoft.Boogie.AbstractInterpretation;
using Microsoft.Boogie;
using Microsoft.Boogie.Z3;
using Microsoft.Boogie.VCExprAST;
using Microsoft.Boogie.Simplify;
using TypeAst = System.IntPtr;
using TermAst = System.IntPtr;
using ConstDeclAst = System.IntPtr;
using ConstAst = System.IntPtr;
using Value = System.IntPtr;
using PatternAst = System.IntPtr;
namespace Microsoft.Boogie.Z3
{
public class Z3apiProcessTheoremProver : ApiProverInterface
{
public Z3apiProcessTheoremProver(Z3InstanceOptions opts, DeclFreeProverContext ctxt)
{
this.options = opts;
this.context = (Z3apiProverContext) ctxt;
this.numAxiomsPushed = 0;
}
private Z3InstanceOptions options;
private Z3apiProverContext context;
public override ProverContext Context
{
get { return context; }
}
public override VCExpressionGenerator VCExprGen
{
get { return context.ExprGen; }
}
private int numAxiomsPushed;
public override void Close()
{
base.Close();
context.CloseLog();
context.z3.Dispose();
context.config.Dispose();
}
public void PushAxiom(VCExpr axiom)
{
context.CreateBacktrackPoint();
LineariserOptions linOptions = new Z3LineariserOptions(false, (Z3InstanceOptions)this.options, new List<VCExprVar>());
context.AddAxiom(axiom, linOptions);
}
private void PushConjecture(VCExpr conjecture)
{
context.CreateBacktrackPoint();
LineariserOptions linOptions = new Z3LineariserOptions(false, (Z3InstanceOptions)this.options, new List<VCExprVar>());
context.AddConjecture(conjecture, linOptions);
}
public override void PushVCExpression(VCExpr vc)
{
PushAxiom(vc);
numAxiomsPushed++;
}
public void CreateBacktrackPoint()
{
context.CreateBacktrackPoint();
}
public override void BeginCheck(string descriptiveName, VCExpr vc, ErrorHandler handler)
{
LineariserOptions linOptions = new Z3LineariserOptions(false, (Z3InstanceOptions)this.options, new List<VCExprVar>());
Push();
context.AddAxiom(context.Axioms, linOptions);
context.AddConjecture(vc, linOptions);
outcome = context.Check(out z3LabelModels);
Pop();
}
public override void Check()
{
outcome = context.Check(out z3LabelModels);
}
public override void CheckAssumptions(List<VCExpr> assumptions, out List<int> unsatCore)
{
LineariserOptions linOptions = new Z3LineariserOptions(false, (Z3InstanceOptions)this.options, new List<VCExprVar>());
outcome = context.CheckAssumptions(assumptions, linOptions, out z3LabelModels, out unsatCore);
}
public override void Push()
{
context.CreateBacktrackPoint();
}
public override void Pop()
{
context.Backtrack();
}
public override void Assert(VCExpr vc, bool polarity)
{
LineariserOptions linOptions = new Z3LineariserOptions(false, (Z3InstanceOptions)this.options, new List<VCExprVar>());
if (polarity)
context.AddAxiom(vc, linOptions);
else
context.AddConjecture(vc, linOptions);
}
public override void AssertAxioms()
{
LineariserOptions linOptions = new Z3LineariserOptions(false, (Z3InstanceOptions)this.options, new List<VCExprVar>());
context.AddAxiom(context.Axioms, linOptions);
}
// Number of axioms pushed since the last call to FlushAxioms
public override int NumAxiomsPushed()
{
return numAxiomsPushed;
}
public override int FlushAxiomsToTheoremProver()
{
var ret = numAxiomsPushed;
numAxiomsPushed = 0;
return ret;
}
private Outcome outcome;
private List<Z3ErrorModelAndLabels> z3LabelModels = new List<Z3ErrorModelAndLabels>();
[NoDefaultContract]
public override Outcome CheckOutcome(ErrorHandler handler)
{
if (outcome == Outcome.Invalid)
{
foreach (Z3ErrorModelAndLabels z3LabelModel in z3LabelModels)
{
List<string> unprefixedLabels = RemovePrefixes(z3LabelModel.RelevantLabels);
handler.OnModel(unprefixedLabels, z3LabelModel.ErrorModel);
}
}
return outcome;
}
private List<string> RemovePrefixes(List<string> labels)
{
List<string> result = new List<string>();
foreach (string label in labels)
{
if (label.StartsWith("+"))
{
result.Add(label.Substring(1));
}
else if (label.StartsWith("|"))
{
result.Add(label.Substring(1));
}
else if (label.StartsWith("@"))
{
result.Add(label.Substring(1));
}
else
throw new Exception("Unknown prefix in label " + label);
}
return result;
}
}
}
namespace Microsoft.Boogie.Z3api
{
public class Factory : ProverFactory
{
public override object SpawnProver(ProverOptions options, object ctxt)
{
return new Z3apiProcessTheoremProver((Z3InstanceOptions) options, (Z3apiProverContext) ctxt);
}
public override object NewProverContext(ProverOptions opts)
{
if (CommandLineOptions.Clo.BracketIdsInVC < 0)
{
CommandLineOptions.Clo.BracketIdsInVC = 0;
}
VCExpressionGenerator gen = new VCExpressionGenerator();
return new Z3apiProverContext((Z3InstanceOptions)opts, gen);
}
public override ProverOptions BlankProverOptions()
{
return new Z3InstanceOptions();
}
}
}
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