acceptable_iter:

Number of "acceptable" iterates before triggering termination. $\;$
If the algorithm encounters this many successive "acceptable" iterates (see "acceptable_tol"), it terminates, assuming that the problem has been solved to best possible accuracy given round-off. If it is set to zero, this heuristic is disabled. The valid range for this integer option is $0 \le {\tt acceptable\_iter } < {\tt +inf}$ and its default value is $15$.