How to track the value of target function during ortools mixed-integer-programming solving process?

Question

I'm using ortools SCIP to solve a really large mixed-integer-programming problem.

solver = pywraplp.Solver_CreateSolver('SCIP')

"""
Problem Definition Is Omitted Here
"""

solver.Minimize(target_function)

status = solver.Solve()

That problem costs more than 30 minutes.

The SCIP uses branch-cut-and-price to solve the mixed-integer-programming problem.

Each time, the SCIP would cut some branches.

So, my question is, how to print the value of the target function, after each cut(after each iteration)?

Answer 1

Looks like a SCIP question and not an OR-Tools one.

So how would you do it with the SCIP binary or library.

If you know how to do this, I believe there are no mechanism in OR-Tools linear solver wrappers to support that, but maybe there is a parameter to display that kind of info. In that case, you should be able to set it directly through the API.