private int NumOfCommands(VCHint hint)
{
if (hint is AssumeConjHint assumeConjHint)
{
return(assumeConjHint.NumCommands);
}
throw new ProofGenUnexpectedStateException(GetType(), "unexpected hint");
}
public void AddHint(Cmd cmd, VCHint hint)
{
if (nextCmd < 0 || cmd != cmds[nextCmd])
{
throw new ProofGenUnexpectedStateException(GetType(), "current hint database does not match cmd");
}
_hints[nextCmd] = hint;
nextCmd--;
}
/// <summary>
/// check whether assumeCmd is special with respect to VC and if so, store hint in out parameter, otherwise
/// store null in <paramref name="hint" />
/// </summary>
/// <returns>true, if is a special case <paramref name="hint" />, false otherwise</returns>
private bool IsSpecialAssumeStmt(AssumeCmd assumeCmd, VCExpr exprVC, VCExpr postVC, out VCHint hint)
{
if (exprVC.Equals(VCExpressionGenerator.False))
{
hint = new AssumeSimpleHint(AssumeSimpleHint.AssumeSimpleType.ASSUME_FALSE);
return(true);
}
if (postVC.Equals(VCExpressionGenerator.False))
{
hint = new AssumeSimpleHint(AssumeSimpleHint.AssumeSimpleType.ASSUME_NOT);
return(true);
}
if (exprVC.Equals(VCExpressionGenerator.True) || postVC.Equals(VCExpressionGenerator.True))
{
hint = new AssumeSimpleHint(AssumeSimpleHint.AssumeSimpleType.ASSUME_TRUE);
return(true);
}
hint = null;
return(false);
}
