Trouble with high sweep counts

[zmorrell]

Hello,
Great package, I am very excited to work with it. I have been having some trouble using higher sweep counts (> ~2000). I have distilled the problem to a minimal example. I get a segmentation fault when I try to execute the following code:

from pysa.sa import Solver
import numpy as np

float_type = 'float32'
n_vars = 2 
problem = 2 * np.random.random((n_vars, n_vars)) - 1 
problem = (problem + problem.T) / 2 

solver = Solver(problem=problem, problem_type='ising', float_type=float_type)

solver.metropolis_update(num_sweeps = 2048)

I have done some initial testing and I can run up to 2033 sweeps without segmentation fault, though I don't know if this number is machine specific.

Is there something that I am doing wrong, or is there some limit on the number of sweeps?

Thank you in advance!