***,C4H2, CASPT3(8,8)/aug-cc-pVTZ calculation between S0 and triplet Sigma(+)(u) states
memory,2000,m
file,2,c4h2_cas8_avtz_stv2.wfu
GEOMTYP=xyz
BOHR
GEOMETRY={
C    0.00000000            0.00000000            1.29447700
C    0.00000000            0.00000000           -1.29447700
C    0.00000000            0.00000000            3.58448429
C    0.00000000            0.00000000           -3.58448429
H    0.00000000            0.00000000            5.58943003
H    0.00000000            0.00000000           -5.58943003}

BASIS=AVTZ

INT

{MULTI
occ,5,2,2,0,4,2,2,0
closed,5,0,0,0,4,0,0,0
pspace,1.0
wf,26,1,0
wf,26,5,2
expec2,lzz
canonical
print,orbitals,civector}

{RS3,shift=0.3
wf,26,1,0}

{RS3,shift=0.3
wf,26,5,2}

{RS3,shift=0.3,ipea=0.25
wf,26,1,0}

{RS3,shift=0.3,ipea=0.25
wf,26,5,2}
---