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mirror of https://github.com/LCPQ/quantum_package synced 2024-06-02 03:15:29 +02:00
quantum_package/plugins/Full_CI_ZMQ/selection_double.irp.f
2016-09-08 10:12:28 +02:00

655 lines
20 KiB
Fortran

subroutine select_doubles(i_generator,hole_mask,particle_mask,fock_diag_tmp,E0,pt2,buf)
use bitmasks
use selection_types
implicit none
integer, intent(in) :: i_generator
integer(bit_kind), intent(in) :: hole_mask(N_int,2), particle_mask(N_int,2)
double precision, intent(in) :: fock_diag_tmp(mo_tot_num)
double precision, intent(in) :: E0(N_states)
double precision, intent(inout) :: pt2(N_states)
type(selection_buffer), intent(inout) :: buf
double precision :: mat(N_states, mo_tot_num, mo_tot_num)
integer :: h1,h2,s1,s2,i1,i2,ib,sp,k
integer(bit_kind) :: hole(N_int,2), particle(N_int,2), mask(N_int, 2)
logical :: fullMatch, ok
do k=1,N_int
hole (k,1) = iand(psi_det_generators(k,1,i_generator), hole_mask(k,1))
hole (k,2) = iand(psi_det_generators(k,2,i_generator), hole_mask(k,2))
particle(k,1) = iand(not(psi_det_generators(k,1,i_generator)), particle_mask(k,1))
particle(k,2) = iand(not(psi_det_generators(k,2,i_generator)), particle_mask(k,2))
enddo
integer :: N_holes(2), N_particles(2)
integer :: hole_list(N_int*bit_kind_size,2)
integer :: particle_list(N_int*bit_kind_size,2)
call bitstring_to_list_ab(hole , hole_list , N_holes , N_int)
call bitstring_to_list_ab(particle, particle_list, N_particles, N_int)
call assert(psi_det_generators(1,1,i_generator) == psi_det_sorted(1,1,i_generator), "sorted selex")
do s1=1,2
do s2=s1,2
sp = s1
if(s1 /= s2) sp = 3
do i1=N_holes(s1),1,-1 ! Generate low excitations first
ib = 1
if(s1 == s2) ib = i1+1
do i2=N_holes(s2),ib,-1 ! Generate low excitations first
h1 = hole_list(i1,s1)
h2 = hole_list(i2,s2)
call apply_holes(psi_det_generators(1,1,i_generator), s1,h1,s2,h2, mask, ok, N_int)
call assert(ok, irp_here)
logical :: banned(mo_tot_num, mo_tot_num)
logical :: bannedOrb(mo_tot_num, 2)
banned = .false.
bannedOrb = .false.
bannedOrb(h1, s1) = .true.
bannedOrb(h2, s2) = .true.
call spot_isinwf(mask, psi_det_sorted, i_generator, N_det, banned, fullMatch)
if(fullMatch) cycle
if(sp /= 2) call spot_occupied(mask(1,1), bannedOrb(1,1))
if(sp /= 1) call spot_occupied(mask(1,2), bannedOrb(1,2))
mat = 0d0
call splash_pq(mask, sp, psi_det_sorted, i_generator, N_det_selectors, bannedOrb, banned, mat)
call fill_buffer_double(i_generator, sp, h1, h2, bannedOrb, banned, fock_diag_tmp, E0, pt2, mat, buf)
end do
end do
end do
end do
end subroutine
subroutine fill_buffer_double(i_generator, sp, h1, h2, bannedOrb, banned, fock_diag_tmp, E0, pt2, mat, buf)
use bitmasks
use selection_types
implicit none
integer, intent(in) :: i_generator, sp, h1, h2
double precision, intent(in) :: mat(N_states, mo_tot_num, mo_tot_num)
logical, intent(in) :: bannedOrb(mo_tot_num, 2), banned(mo_tot_num, mo_tot_num)
double precision, intent(in) :: fock_diag_tmp(mo_tot_num)
double precision, intent(in) :: E0(N_states)
double precision, intent(inout) :: pt2(N_states)
type(selection_buffer), intent(inout) :: buf
logical :: ok
integer :: s1, s2, p1, p2, ib, j
integer(bit_kind) :: mask(N_int, 2), det(N_int, 2)
double precision :: e_pert, delta_E, val, Hii
double precision, external :: diag_H_mat_elem_fock
logical, external :: detEq
if(N_states > 1) stop "fill_buffer_double N_states > 1"
if(sp == 3) then
s1 = 1
s2 = 2
else
s1 = sp
s2 = sp
end if
call apply_holes(psi_det_generators(1,1,i_generator), s1, h1, s2, h2, mask, ok, N_int)
call assert(ok, "sosoqs")
do p1=1,mo_tot_num
if(bannedOrb(p1, s1)) cycle
ib = 1
if(sp /= 3) ib = p1+1
do p2=ib,mo_tot_num
if(bannedOrb(p2, s2)) cycle
if(banned(p1,p2)) cycle
if(mat(1, p1, p2) == 0d0) cycle
call apply_particles(mask, s1, p1, s2, p2, det, ok, N_int)
call assert(ok, "ododod")
val = mat(1, p1, p2)
Hii = diag_H_mat_elem_fock(psi_det_generators(1,1,i_generator),det,fock_diag_tmp,N_int)
delta_E = E0(1) - Hii
if (delta_E < 0.d0) then
e_pert = 0.5d0 * (-dsqrt(delta_E * delta_E + 4.d0 * val * val) - delta_E)
else
e_pert = 0.5d0 * ( dsqrt(delta_E * delta_E + 4.d0 * val * val) - delta_E)
endif
pt2(1) += e_pert
if(dabs(e_pert) > buf%mini) then
do j=1,buf%cur-1
if(detEq(buf%det(1,1,j), det, N_int)) then
print *, "tops"
print *, i_generator, s1, s2, h1, h2,p1,p2
stop
end if
end do
call add_to_selection_buffer(buf, det, e_pert)
end if
end do
end do
end subroutine
subroutine splash_pq(mask, sp, det, i_gen, N_sel, bannedOrb, banned, mat)
use bitmasks
implicit none
integer(bit_kind),intent(in) :: mask(N_int, 2), det(N_int, 2, N_sel)
integer, intent(in) :: sp, i_gen, N_sel
logical, intent(inout) :: bannedOrb(mo_tot_num, 2), banned(mo_tot_num, mo_tot_num)
double precision, intent(inout) :: mat(N_states, mo_tot_num, mo_tot_num)
integer :: i, j, h(0:2,2), p(0:4,2), nt
integer(bit_kind) :: perMask(N_int, 2), mobMask(N_int, 2), negMask(N_int, 2)
mat = 0d0
do i=1,N_int
negMask(i,1) = not(mask(i,1))
negMask(i,2) = not(mask(i,2))
end do
do i=1, N_sel
nt = 0
do j=1,N_int
mobMask(j,1) = iand(negMask(j,1), det(j,1,i))
mobMask(j,2) = iand(negMask(j,2), det(j,2,i))
nt += popcnt(mobMask(j, 1)) + popcnt(mobMask(j, 2))
end do
if(nt > 4) cycle
do j=1,N_int
perMask(j,1) = iand(mask(j,1), not(det(j,1,i)))
perMask(j,2) = iand(mask(j,2), not(det(j,2,i)))
end do
call bitstring_to_list(perMask(1,1), h(1,1), h(0,1), N_int)
call bitstring_to_list(perMask(1,2), h(1,2), h(0,2), N_int)
call bitstring_to_list(mobMask(1,1), p(1,1), p(0,1), N_int)
call bitstring_to_list(mobMask(1,2), p(1,2), p(0,2), N_int)
call assert(nt >= 2, irp_here//"qsd")
if(i < i_gen) then
if(nt == 4) call past_d2(banned, p, sp)
if(nt == 3) call past_d1(bannedOrb, p)
call assert(nt /= 2, "should have been discarded")
else
if(nt == 4) then
call get_d2(det(1,1,i), psi_phasemask(1,1,i), bannedOrb, banned, mat, mask, h, p, sp, psi_selectors_coef_transp(1, i))
else if(nt == 3) then
call get_d1(det(1,1,i), psi_phasemask(1,1,i), bannedOrb, banned, mat, mask, h, p, sp, psi_selectors_coef_transp(1, i))
else
call get_d0(det(1,1,i), psi_phasemask(1,1,i), bannedOrb, banned, mat, mask, h, p, sp, psi_selectors_coef_transp(1, i))
end if
end if
end do
end subroutine
subroutine get_d2(gen, phasemask, bannedOrb, banned, mat, mask, h, p, sp, coefs)
use bitmasks
implicit none
integer(bit_kind), intent(in) :: mask(N_int, 2), gen(N_int, 2), phasemask(N_int, 2)
logical, intent(in) :: bannedOrb(mo_tot_num, 2), banned(mo_tot_num, mo_tot_num)
double precision, intent(in) :: coefs(N_states)
double precision, intent(inout) :: mat(N_states, mo_tot_num, mo_tot_num)
integer, intent(in) :: h(0:2,2), p(0:4,2), sp
double precision, external :: get_phase_bi
integer :: i, j, tip, ma, mi, puti, putj
integer :: h1, h2, p1, p2, i1, i2
double precision :: hij, phase
integer, parameter:: turn2d(2,3,4) = reshape((/0,0, 0,0, 0,0, 3,4, 0,0, 0,0, 2,4, 1,4, 0,0, 2,3, 1,3, 1,2 /), (/2,3,4/))
integer, parameter :: turn2(2) = (/2, 1/)
integer, parameter :: turn3(2,3) = reshape((/2,3, 1,3, 1,2/), (/2,3/))
tip = p(0,1) * p(0,2)
call assert(p(0,1) + p(0,2) == 4, irp_here//"df")
ma = sp
if(p(0,1) > p(0,2)) ma = 1
if(p(0,1) < p(0,2)) ma = 2
mi = mod(ma, 2) + 1
!print *, "d2 SPtip", SP, tip
if(sp == 3) then
if(tip == 3) then
puti = p(1, mi)
do i = 1, 3
putj = p(i, ma)
i1 = turn3(1,i)
i2 = turn3(2,i)
p1 = p(i1, ma)
p2 = p(i2, ma)
call assert(h(0,ma) == 2, "dmdmd")
call assert(p(0, ma) == 3, "dmdm2")
h1 = h(1, ma)
h2 = h(2, ma)
hij = (integral8(p1, p2, h1, h2) - integral8(p2,p1, h1, h2)) * get_phase_bi(phasemask, ma, ma, h1, p1, h2, p2)
call debug_hij(hij, gen, mask, mi, ma, puti, putj)
if(ma == 1) then
mat(:, putj, puti) += coefs * hij
else
mat(:, puti, putj) += coefs * hij
end if
end do
else
call assert(tip == 4, "df")
do i = 1,2
do j = 1,2
puti = p(i, 1)
putj = p(j, 2)
p1 = p(turn2(i), 1)
p2 = p(turn2(j), 2)
h1 = h(1,1)
h2 = h(1,2)
hij = integral8(p1, p2, h1, h2) * get_phase_bi(phasemask, 1, 2, h1, p1, h2, p2)
call debug_hij(hij, gen, mask, 1, 2, puti, putj)
mat(:, puti, putj) += coefs * hij
end do
end do
end if
else
if(tip == 0) then
h1 = h(1, ma)
h2 = h(2, ma)
do i=1,3
puti = p(i, ma)
do j=i+1,4
putj = p(j, ma)
i1 = turn2d(1, i, j)
i2 = turn2d(2, i, j)
p1 = p(i1, ma)
p2 = p(i2, ma)
hij = (integral8(p1, p2, h1, h2) - integral8(p2,p1, h1, h2)) * get_phase_bi(phasemask, ma, ma, h1, p1, h2, p2)
call debug_hij(hij, gen, mask, ma, ma, puti, putj)
mat(:, puti, putj) += coefs * hij
end do
end do
else if(tip == 3) then
h1 = h(1, mi)
h2 = h(1, ma)
p1 = p(1, mi)
call assert(ma == sp, "dldl")
do i=1,3
p2 = p(i, ma)
puti = p(turn3(1,i), ma)
putj = p(turn3(2,i), ma)
hij = integral8(p1, p2, h1, h2) * get_phase_bi(phasemask, mi, ma, h1, p1, h2, p2)
call debug_hij(hij, gen, mask, ma, ma, puti, putj)
mat(:, min(puti, putj), max(puti, putj)) += coefs * hij
end do
else ! tip == 4
call assert(tip == 4, "qsdf")
puti = p(1, sp)
putj = p(2, sp)
p1 = p(1, mi)
p2 = p(2, mi)
h1 = h(1, mi)
h2 = h(2, mi)
hij = (integral8(p1, p2, h1, h2) - integral8(p2,p1, h1, h2)) * get_phase_bi(phasemask, mi, mi, h1, p1, h2, p2)
call debug_hij(hij, gen, mask,ma,ma, puti, putj)
mat(:, puti, putj) += coefs * hij
end if
end if
end subroutine
subroutine debug_hij(hij, gen, mask, s1, s2, p1, p2)
use bitmasks
implicit none
integer(bit_kind), intent(in) :: gen(N_int,2), mask(N_int,2)
double precision, intent(in) :: hij
integer, intent(in) :: s1, s2, p1, p2
integer(bit_kind) :: det(N_int,2)
double precision :: hij_ref, phase_ref
logical :: ok
integer :: degree
integer :: exc(0:2,2,2)
call apply_particles(mask, s1, p1, s2, p2, det, ok, N_int)
call assert(ok, "nokey")
call i_H_j_phase_out(gen,det,N_int,hij_ref,phase_ref,exc,degree)
if(hij /= hij_ref) then
print *, hij, hij_ref
print *, s1, s2, p1, p2
call debug_det(gen, N_int)
call debug_det(mask, N_int)
stop
end if
! print *, "fourar", hij, hij_ref,s1,s2
end function
subroutine get_d1(gen, phasemask, bannedOrb, banned, mat, mask, h, p, sp, coefs)
use bitmasks
implicit none
integer(bit_kind), intent(in) :: mask(N_int, 2), gen(N_int, 2), phasemask(N_int, 2)
logical, intent(in) :: bannedOrb(mo_tot_num, 2), banned(mo_tot_num, mo_tot_num)
integer(bit_kind) :: det(N_int, 2)
double precision, intent(in) :: coefs(N_states)
double precision, intent(inout) :: mat(N_states, mo_tot_num, mo_tot_num)
double precision :: hij, tmp_row(N_states, mo_tot_num), tmp_row2(N_states, mo_tot_num)
double precision, external :: get_phase_bi
logical :: lbanned(mo_tot_num, 2), ok
integer :: puti, putj, ma, mi, s1, s2, i, i1, i2, j, hfix, pfix, h1, h2, p1, p2, ib
integer, intent(in) :: h(0:2,2), p(0:4,2), sp
integer, parameter :: turn2(2) = (/2,1/)
integer, parameter :: turn3(2,3) = reshape((/2,3, 1,3, 1,2/), (/2,3/))
lbanned = bannedOrb
do i=1, p(0,1)
lbanned(p(i,1), 1) = .true.
end do
do i=1, p(0,2)
lbanned(p(i,2), 2) = .true.
end do
ma = 1
if(p(0,2) >= 2) ma = 2
mi = turn2(ma)
!print *, "d1 SP", sp, p(0,1)*p(0,2)
if(sp == 3) then
!move MA
call assert(p(0,1)*p(0,2) == 2, "ddmmm")
puti = p(1,mi)
hfix = h(1,ma)
p1 = p(1,ma)
p2 = p(2,ma)
if(.not. bannedOrb(puti, mi)) then
tmp_row = 0d0
do putj=1, hfix-1
if(lbanned(putj, ma)) cycle
hij = (integral8(p1, p2, putj, hfix)-integral8(p2,p1,putj,hfix)) * get_phase_bi(phasemask, ma, ma, putj, p1, hfix, p2)
call debug_hij(hij, gen, mask, mi, ma, puti, putj)
tmp_row(:,putj) += hij * coefs
end do
do putj=hfix+1, mo_tot_num
if(lbanned(putj, ma)) cycle
hij = (integral8(p1, p2, hfix, putj)-integral8(p2,p1,hfix,putj)) * get_phase_bi(phasemask, ma, ma, hfix, p1, putj, p2)
call debug_hij(hij, gen, mask, mi, ma, puti, putj)
tmp_row(:,putj) += hij * coefs
end do
if(ma == 1) then
mat(:,:,puti) += tmp_row(:,:)
else
mat(:,puti,:) += tmp_row(:,:)
end if
end if
!MOVE MI
pfix = p(1,mi)
tmp_row = 0d0
tmp_row2 = 0d0
do puti=1,mo_tot_num
if(lbanned(puti,mi)) cycle
!p1 fixed
putj = p1
hij = integral8(p2,pfix,hfix,puti) * get_phase_bi(phasemask, ma, mi, hfix, p2, puti, pfix)
call debug_hij(hij, gen, mask, mi, ma, puti, putj)
tmp_row(:,puti) += hij * coefs
putj = p2
hij = integral8(p1,pfix,hfix,puti) * get_phase_bi(phasemask, ma, mi, hfix, p1, puti, pfix)
call debug_hij(hij, gen, mask, mi, ma, puti, putj)
tmp_row2(:,puti) += hij * coefs
end do
if(mi == 1) then
mat(:,:,p1) += tmp_row(:,:)
mat(:,:,p2) += tmp_row2(:,:)
else
mat(:,p1,:) += tmp_row(:,:)
mat(:,p2,:) += tmp_row2(:,:)
end if
else
if(p(0,ma) == 3) then
do i=1,3
hfix = h(1,ma)
puti = p(i, ma)
p1 = p(turn3(1,i), ma)
p2 = p(turn3(2,i), ma)
tmp_row = 0d0
do putj=1,hfix-1
if(lbanned(putj,ma)) cycle
hij = (integral8(p1, p2, putj, hfix)-integral8(p2,p1,putj,hfix)) * get_phase_bi(phasemask, ma, ma, putj, p1, hfix, p2)
call debug_hij(hij, gen, mask, ma, ma, puti, putj)
tmp_row(:,putj) += hij * coefs
end do
do putj=hfix+1,mo_tot_num
if(lbanned(putj,ma)) cycle
hij = (integral8(p1, p2, hfix, putj)-integral8(p2,p1,hfix,putj)) * get_phase_bi(phasemask, ma, ma, hfix, p1, putj, p2)
call debug_hij(hij, gen, mask, ma, ma, puti, putj)
tmp_row(:,putj) += hij * coefs
end do
mat(:, :puti-1, puti) += tmp_row(:,:puti-1)
mat(:, puti, puti:) += tmp_row(:,puti:)
end do
else
call assert(sp == ma, "sp == ma")
hfix = h(1,mi)
pfix = p(1,mi)
p1 = p(1,ma)
p2 = p(2,ma)
tmp_row = 0d0
tmp_row2 = 0d0
do puti=1,mo_tot_num
if(lbanned(puti,ma)) cycle
putj = p2
hij = integral8(pfix, p1, hfix, puti) * get_phase_bi(phasemask, mi, ma, hfix, pfix, puti, p1)
call debug_hij(hij, gen, mask, ma, ma, putj, puti)
tmp_row(:,puti) += hij * coefs
putj = p1
hij = integral8(pfix, p2, hfix, puti) * get_phase_bi(phasemask, mi, ma, hfix, pfix, puti, p2)
call debug_hij(hij, gen, mask, ma, ma, putj, puti)
tmp_row2(:,puti) += hij * coefs
end do
mat(:,:p2-1,p2) += tmp_row(:,:p2-1)
mat(:,p2,p2:) += tmp_row(:,p2:)
mat(:,:p1-1,p1) += tmp_row2(:,:p1-1)
mat(:,p1,p1:) += tmp_row2(:,p1:)
end if
end if
!! MONO
if(sp == 3) then
s1 = 1
s2 = 2
else
s1 = sp
s2 = sp
end if
do i1=1,p(0,s1)
ib = 1
if(s1 == s2) ib = i1+1
do i2=ib,p(0,s2)
p1 = p(i1,s1)
p2 = p(i2,s2)
if(bannedOrb(p1, s1) .or. bannedOrb(p2, s2)) cycle
call apply_particles(mask, s1, p1, s2, p2, det, ok, N_int)
call i_h_j(gen, det, N_int, hij)
mat(:, p1, p2) += coefs * hij
end do
end do
end subroutine
subroutine get_d0(gen, phasemask, bannedOrb, banned, mat, mask, h, p, sp, coefs)
use bitmasks
implicit none
integer(bit_kind), intent(in) :: gen(N_int, 2), mask(N_int, 2), phasemask(N_int, 2)
logical, intent(in) :: bannedOrb(mo_tot_num, 2), banned(mo_tot_num, mo_tot_num)
integer(bit_kind) :: det(N_int, 2)
double precision, intent(in) :: coefs(N_states)
double precision, intent(inout) :: mat(N_states, mo_tot_num, mo_tot_num)
integer, intent(in) :: h(0:2,2), p(0:4,2), sp
integer :: i, j, s, h1, h2, p1, p2, puti, putj
double precision :: hij, phase
double precision, external :: get_phase_bi
logical :: ok
!print *, "d0 SP", sp
if(sp == 3) then ! AB
h1 = p(1,1)
h2 = p(1,2)
do p1=1, mo_tot_num
if(bannedOrb(p1, 1)) cycle
do p2=1, mo_tot_num
if(bannedOrb(p2,2)) cycle
if(banned(p1, p2)) cycle ! rentable?
if(p1 == h1 .or. p2 == h2) then
call apply_particles(mask, 1,p1,2,p2, det, ok, N_int)
call assert(ok, "zsdq")
call i_h_j(gen, det, N_int, hij)
mat(:, p1, p2) += coefs * hij
else
hij = integral8(p1, p2, h1, h2) * get_phase_bi(phasemask, 1, 2, h1, p1, h2, p2)
phase = get_phase_bi(phasemask, 1, 2, h1, p1, h2, p2)
call debug_hij(hij, gen, mask, 1, 2, p1, p2)
mat(:, p1, p2) += coefs * hij
end if
end do
end do
else ! AA BB
p1 = p(1,sp)
p2 = p(2,sp)
do puti=1, mo_tot_num
if(bannedOrb(puti, sp)) cycle
do putj=puti+1, mo_tot_num
if(bannedOrb(putj, sp)) cycle
if(banned(puti, putj)) cycle ! rentable?
if(puti == p1 .or. putj == p2 .or. puti == p2 .or. putj == p1) then
call apply_particles(mask, sp,puti,sp,putj, det, ok, N_int)
call ASSERT(ok, "ssss")
call i_h_j(gen, det, N_int, hij)
mat(:, puti, putj) += coefs * hij
else
hij = (integral8(p1, p2, puti, putj) - integral8(p2, p1, puti, putj))* get_phase_bi(phasemask, sp, sp, puti, p1 , putj, p2)
mat(:, puti, putj) += coefs * hij
call debug_hij(hij, gen, mask, sp, sp, puti, putj)
end if
end do
end do
end if
end subroutine
subroutine past_d1(bannedOrb, p)
use bitmasks
implicit none
logical, intent(inout) :: bannedOrb(mo_tot_num, 2)
integer, intent(in) :: p(0:4, 2)
integer :: i,s
do s = 1, 2
do i = 1, p(0, s)
bannedOrb(p(i, s), s) = .true.
end do
end do
end subroutine
subroutine past_d2(banned, p, sp)
use bitmasks
implicit none
logical, intent(inout) :: banned(mo_tot_num, mo_tot_num)
integer, intent(in) :: p(0:4, 2), sp
integer :: i,j
if(sp == 3) then
do i=1,p(0,1)
do j=1,p(0,2)
banned(p(i,1), p(j,2)) = .true.
end do
end do
else
do i=1,p(0, sp)
do j=1,i-1
banned(p(j,sp), p(i,sp)) = .true.
banned(p(i,sp), p(j,sp)) = .true.
end do
end do
end if
end subroutine
subroutine spot_isinwf(mask, det, i_gen, N, banned, fullMatch)
use bitmasks
implicit none
integer(bit_kind),intent(in) :: mask(N_int, 2), det(N_int, 2, N)
integer, intent(in) :: i_gen, N
logical, intent(inout) :: banned(mo_tot_num, mo_tot_num)
logical, intent(out) :: fullMatch
integer :: i, j, na, nb, list(3)
integer(bit_kind) :: myMask(N_int, 2), negMask(N_int, 2)
fullMatch = .false.
do i=1,N_int
negMask(i,1) = not(mask(i,1))
negMask(i,2) = not(mask(i,2))
end do
genl : do i=1, N
do j=1, N_int
if(iand(det(j,1,i), mask(j,1)) /= mask(j, 1)) cycle genl
if(iand(det(j,2,i), mask(j,2)) /= mask(j, 2)) cycle genl
end do
if(i < i_gen) then
fullMatch = .true.
return
end if
do j=1, N_int
myMask(j, 1) = iand(det(j, 1, i), negMask(j, 1))
myMask(j, 2) = iand(det(j, 2, i), negMask(j, 2))
end do
call bitstring_to_list(myMask(1,1), list(1), na, N_int)
call bitstring_to_list(myMask(1,2), list(na+1), nb, N_int)
call assert(na + nb == 2, "oyo")
call assert(na == 1 .or. list(1) < list(2), "sqdsmmmm")
banned(list(1), list(2)) = .true.
end do genl
end subroutine