Gurobi 5.6.3 (linux64) logging started Wed Oct  8 04:46:34 2014

Optimize a model with 51757 rows, 51756 columns and 154814 nonzeros
Presolve time: 1.41s
Presolved: 51757 rows, 51756 columns, 154814 nonzeros
Variable types: 0 continuous, 51756 integer (51756 binary)
Found heuristic solution: objective 22.7468636

Root relaxation: objective 1.455126e+01, 2838 iterations, 0.46 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

*    0     0               0      14.5512597   14.55126  0.00%     -    2s

Explored 0 nodes (2838 simplex iterations) in 2.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.455125973820e+01, best bound 1.455125973820e+01, gap 0.0%