[do_pt2_end]
type: logical
doc: If true, compute the PT2 at the end of the selection
interface: input
default: True

[PT2_max]
type: PT2_energy
doc: The selection process stops when the largest PT2 (for all the state) is lower
     than pt2_max in absolute value
interface: input
default: 0.0001

[var_pt2_ratio]
type: Normalized_float
doc: The selection process stops when the energy ratio variational/(variational+PT2)
     is equal to var_pt2_ratio
interface: input
default: 0.75