I’m running the following circuit on the strawberry fields platform and the probabilities it generates arent adding to one and I can’t figure out why.

The circuit:

```
eng = sf.Engine("fock", backend_options={"cutoff_dim": 2})
prog = sf.Program(4)
array = [0.] * 6
with prog.context as q:
ops.Fock(1) | q[0]
ops.Fock(1) | q[1]
ops.Fock(0) | q[2]
ops.Fock(0) | q[3]
ops.Interferometer(U) | (q[0], q[1], q[2], q[3])
result = eng.run(prog)
state = result.state
probs = state.all_fock_probs()
probs = np.array(probs)
array[0] = probs[0,0,1,1]
array[1] = probs[0,1,0,1]
array[2] = probs[0,1,1,0]
array[3] = probs[1,0,0,1]
array[4] = probs[1,0,1,0]
array[5] = probs[1,1,0,0]
```

U is:

[[ 0.40364712+8.15600153e-01j 0.35110689+1.43525025e-01j

0.15986655-4.72290949e-02j 0.00723679-1.22329374e-02j]

[ 0.10394578-3.95706514e-01j 0.34043768+6.76229828e-01j

0.4594777 +2.10444020e-01j 0.06021116-1.98798347e-02j]

[-0.0547196 +3.78126539e-02j 0.12569266-5.05463349e-01j

0.3329969 +7.23569755e-01j 0.27692649+1.14698367e-01j]

[ 0.00723156+8.35107163e-04j -0.08869668+6.14897215e-02j

0.08223266-2.74960569e-01j 0.41948884+8.54378436e-01j]]

The array of probabilities it generates:

[1.126429679043999e-05, 0.0014664820957383993, 0.02522048151295811, 0.010012321153092966, 0.22563731287709546, 0.3744367053787543]

And the sum of all probs: 0.6367845673144297