public FuncDecl GetAndAssertPureDecl(IMethodSymbol symbol)
{
FuncDecl declaration;
if (!_assertedDeclarations.TryGetValue(symbol, out declaration))
{
var ctx = _info.Ctx;
var cfg = GetCFG(symbol);
var parameterMappings = symbol.Parameters.Select(x => _info.Mapper.GetSortMapping(x.Type));
var parameterVars = parameterMappings.Select((x, i) => ctx.MkBound((uint)i, x.Sort)).ToArray();
var arguments = parameterMappings.Zip(parameterVars, (a, b) => a.MutatorForValue(b));
Dictionary <ISymbol, Mutator> parameters = symbol.Parameters
.Zip(arguments, (Parameter, Mutator) => new { Parameter, Mutator })
.ToDictionary(x => (ISymbol)x.Parameter, x => x.Mutator);
var returnType = _info.Mapper.GetSortMapping(symbol.ReturnType);
var invocationEntryState = new PureExplorationState(_info, cfg.EntryPoint, returnType, parameters, parameterVars);
var explored = invocationEntryState.Explore();
var definition = explored.CreateUpdate();
var domain = parameterMappings.Select(x => x.Sort).ToArray();
var range = _info.Mapper.GetSortMapping(symbol.ReturnType).Sort;
declaration = ctx.MkFuncDecl(symbol.Name, domain, range);
var body = ctx.MkEq(ctx.MkApp(declaration, parameterVars), definition);
var parameterSymbols = parameterMappings.Select((x, i) => ctx.MkSymbol(i));
var forall = ctx.MkForall(parameterVars.Select(x => x.Sort).ToArray(), parameterSymbols.ToArray(), body);
_info.AutomataCtx.Z3S.Assert(forall);
Assertions.Add(forall);
_assertedDeclarations.Add(symbol, declaration);
_functionBodies.Add(Tuple.Create(declaration, definition, parameterVars));
}
return(declaration);
}
public Mutator GetPureExpr(IMethodSymbol symbol, Mutator[] arguments, Expr[] boundVars)
{
var cfg = GetCFG(symbol);
Dictionary <ISymbol, Mutator> parameters = symbol.Parameters
.Zip(arguments, (Parameter, Mutator) => new { Parameter, Mutator })
.ToDictionary(x => (ISymbol)x.Parameter, x => x.Mutator);
var returnType = _info.Mapper.GetSortMapping(symbol.ReturnType);
var invocationEntryState = new PureExplorationState(_info, cfg.EntryPoint, returnType, parameters, boundVars);
return(invocationEntryState.Explore());
}
public PureExplorationState(PureExplorationState toClone)
: base(toClone)
{
_returnType = toClone._returnType;
}
