Infinite recursion when adding MaxParents(1) constraint

[cmalinmayor]

@tlambert03 I assume there is something wrong with my candidate graph that is causing this issue. I tried to add "hyperedges" to model specific division costs. Any tips?

  File "/Users/malinmayorc/code/darts_experiments/src/darts_utils/tracking/solve_with_motile.py", line 17, in solve_with_motile
    solver.add_constraint(motile.constraints.MaxParents(1))
  File "/Users/malinmayorc/code/motile/motile/solver.py", line 110, in add_constraint
    self.constraints.add(constraint)
  File "ilpy/wrapper.pyx", line 234, in ilpy.wrapper.Constraints.add
  File "/Users/malinmayorc/miniconda3/envs/darts/lib/python3.10/site-packages/ilpy/expressions.py", line 27, in as_constraint
    l_coeffs, q_coeffs, value = _get_coeff_indices(self)
  File "/Users/malinmayorc/miniconda3/envs/darts/lib/python3.10/site-packages/ilpy/expressions.py", line 268, in _get_coeff_indices
    for var, coefficient in _get_coefficients(expr).items():
  File "/Users/malinmayorc/miniconda3/envs/darts/lib/python3.10/site-packages/ilpy/expressions.py", line 342, in _get_coefficients
    _get_coefficients(expr.left, coeffs, scale, var_scale)
  File "/Users/malinmayorc/miniconda3/envs/darts/lib/python3.10/site-packages/ilpy/expressions.py", line 350, in _get_coefficients
    _get_coefficients(expr.left, coeffs, scale, var_scale)
  File "/Users/malinmayorc/miniconda3/envs/darts/lib/python3.10/site-packages/ilpy/expressions.py", line 350, in _get_coefficients
    _get_coefficients(expr.left, coeffs, scale, var_scale)
  File "/Users/malinmayorc/miniconda3/envs/darts/lib/python3.10/site-packages/ilpy/expressions.py", line 350, in _get_coefficients
    _get_coefficients(expr.left, coeffs, scale, var_scale)
  [Previous line repeated 988 more times]
  File "/Users/malinmayorc/miniconda3/envs/darts/lib/python3.10/site-packages/ilpy/expressions.py", line 347, in _get_coefficients
    if isinstance(expr.op, (ast.Mult, ast.Div)):
RecursionError: maximum recursion depth exceeded in __instancecheck__

[cmalinmayor]

Update: Actually, one of the nodes has 1002 previous edges (from my prints: Node 868 has 1002 prev_edges). This is larger than the max recursion depth set for the ilpy expressions. Is there an easy way to fix this?

[cmalinmayor]

(other than reduce my number of edges... which I have now done 😄 )