Gurobi 5.6.3 (linux64) logging started Wed Oct 8 01:15:14 2014 Optimize a model with 32221 rows, 32220 columns and 96302 nonzeros Presolve time: 0.82s Presolved: 32221 rows, 32220 columns, 96302 nonzeros Variable types: 0 continuous, 32220 integer (32220 binary) Found heuristic solution: objective 22.2617783 Root relaxation: objective 1.315093e+01, 2184 iterations, 0.24 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 13.1509267 13.15093 0.00% - 1s Explored 0 nodes (2184 simplex iterations) in 1.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.315092667933e+01, best bound 1.315092667933e+01, gap 0.0%