ProofState.MakeSourcemodule C = Cmodule UnitIndex :
Logtk.Index.UNIT_IDX
with type E.t = Logtk.Term.t * Logtk.Term.t * bool * C.t
and type E.rhs = Logtk.Term.tstatistics on the state (num active, num passive, num simplification)
pretty print the content of the state
debug functions: much more detailed printing