Gurobi 5.6.3 (linux64) logging started Wed Oct 8 02:21:35 2014 Optimize a model with 39007 rows, 39006 columns and 116624 nonzeros Presolve time: 0.97s Presolved: 39007 rows, 39006 columns, 116624 nonzeros Variable types: 0 continuous, 39006 integer (39006 binary) Found heuristic solution: objective 20.1793024 Root relaxation: objective 1.457435e+01, 2660 iterations, 0.33 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 14.5743499 14.57435 0.00% - 1s Explored 0 nodes (2660 simplex iterations) in 1.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.457434986003e+01, best bound 1.457434986003e+01, gap 0.0%