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#! Extrapolated energies with delta correction

nucenergy_ref =   5.1767335623    #TEST

molecule hf {
    F
    H 1 0.92
}

# Get a reasonable guess, to save some iterations
set {
    scf_type      df
    mp2_type      df
    e_convergence 7
    reference     rhf
}

hf.update_geometry()
compare_values(nucenergy_ref, hf.nuclear_repulsion_energy(), 9, "Nuclear repulsion energy") #TEST

# Equivalence tests
mp3_energy = energy('MP3/cc-pVDZ')
mp3_energy_delta = energy('MP2/cc-pVDZ + D:MP3/cc-pVDZ')
compare_values(mp3_energy_delta, mp3_energy, 6, 'MP3 Energy Call vs Delta Check')  #TEST

ccsd_energy_delta = energy('MP2/cc-pVDZ + D:CCSD/cc-pVDZ')
ccsd_energy = energy('CCSD/cc-pVDZ')
compare_values(ccsd_energy_delta, ccsd_energy, 6, 'CCSD Energy Call vs Delta Check')  #TEST

ccsd_t_energy_delta = energy('CCSD/cc-pVDZ + D:CCSD(T)/cc-pVDZ')
ccsd_t_energy = energy('CCSD(T)/cc-pVDZ')
compare_values(ccsd_t_energy_delta, ccsd_t_energy, 6, 'CCSD(T) Energy Call vs Delta Check')  #TEST

ccsd_t_energy_delta = energy('CCSD/cc-pV[DT]Z + D:CCSD(T)/cc-pV[DT]Z')
ccsd_t_energy = energy('CCSD(T)/cc-pV[DT]Z')
compare_values(ccsd_t_energy_delta, ccsd_t_energy, 6, 'CCSD(T) Energy Call vs Delta Check')  #TEST

# Extrapolation test
cbs1_energy = energy('MP2/cc-pV[DT]Z + D:CCSD(T)/cc-pVDZ')
compare_values(-100.383956631, cbs1_energy, 6, 'MP2/cc-pV[DT]Z + D:CCSD(T)/cc-pVDZ Energy')  #TEST

# Need higher angular momentum to do more