This is a follow up of my previous question on LP Relaxation of a MIP using SCIP.
Though I'm able to compute a LP Relaxation solution of my MIP by simply passing the MIP (in CPLEX format) to SoPlex, I observe that the computation time taken by SoPlex is higher than optimizing the MIP using SCIP itself (testing for smaller inputs). As SCIP uses SoPlex internally before solving the MIP, how is this possible? Moreover, my LP Relaxation result is actually giving integer solutions, and the same objective value as the MIP. Am I making a mistake in LP Relaxation? Or is it some property of my problem/formulation?
I'm referring to the total computation time printed by the solvers (not computed myself).