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//-----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All Rights Reserved.
//
//-----------------------------------------------------------------------------
using System;
using System.Diagnostics.Contracts;
using System.Collections.Generic;
using Microsoft.Boogie;
using Microsoft.Boogie.VCExprAST;
using Microsoft.Boogie.Simplify;
using Microsoft.Boogie.Z3;
using System.Collections;
using System.IO;
using System.Threading;
using VC;
namespace Microsoft.Boogie.Houdini {
public class HoudiniVCGen : VCGen {
private Checker checker;
private string descriptiveName;
private VCExpr conjecture;
private ProverInterface.ErrorHandler handler;
CounterexampleCollector collector;
public VCExpressionGenerator VCExprGenerator {
get {
return checker.VCExprGen;
}
}
public Boogie2VCExprTranslator BooogieExprTranslator {
get {
DeclFreeProverContext proverContext = (DeclFreeProverContext)checker.TheoremProver.Context;
return proverContext.BoogieExprTranslator;
}
}
public HoudiniVCGen(Program program, Implementation impl, string logFilePath, bool appendLogFile)
: base(program, logFilePath, appendLogFile) {
descriptiveName = impl.Name;
collector = new CounterexampleCollector();
collector.OnProgress("HdnVCGen", 0, 0, 0.0);
if (CommandLineOptions.Clo.SoundnessSmokeTest) {
throw new Exception("HoudiniVCGen does not support Soundness smoke test.");
}
ConvertCFG2DAG(impl, program);
ModelViewInfo mvInfo;
Hashtable/*TransferCmd->ReturnCmd*/ gotoCmdOrigins = PassifyImpl(impl, program, out mvInfo);
Hashtable/*<int, Absy!>*/ label2absy;
checker = new Checker(this, program, logFilePath, appendLogFile, impl, CommandLineOptions.Clo.ProverKillTime);
if (!(checker.TheoremProver is Z3ProcessTheoremProver)) {
throw new Exception("HdnChecker only works with z3");
}
conjecture = GenerateVC(impl, null, out label2absy, checker);
if (CommandLineOptions.Clo.vcVariety == CommandLineOptions.VCVariety.Local) {
handler = new ErrorReporterLocal(gotoCmdOrigins, label2absy, impl.Blocks, incarnationOriginMap, collector, mvInfo, implName2LazyInliningInfo, checker.TheoremProver.Context, program);
}
else {
handler = new ErrorReporter(gotoCmdOrigins, label2absy, impl.Blocks, incarnationOriginMap, collector, mvInfo, implName2LazyInliningInfo, checker.TheoremProver.Context, program);
}
}
public ProverInterface.Outcome Verify(VCExpr axiom, out List<Counterexample> errors) {
collector.examples.Clear();
VCExpr vc = checker.VCExprGen.Implies(axiom, conjecture);
checker.BeginCheck(descriptiveName, vc, handler);
WaitHandle.WaitAny(new WaitHandle[] { checker.ProverDone });
ProverInterface.Outcome proverOutcome = checker.ReadOutcome();
if (proverOutcome == ProverInterface.Outcome.Invalid) {
Contract.Assume(collector.examples != null);
if (collector.examples.Count == 0) {
string memStr = System.Convert.ToString(System.GC.GetTotalMemory(false));
if (memStr != null)
memStr = "?";
throw new UnexpectedProverOutputException("Outcome.Errors w/ 0 counter examples. " + memStr + " memory used");
}
errors = collector.examples;
}
else {
errors = null;
}
return proverOutcome;
}
}
}
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