Gurobi 5.6.3 (linux64) logging started Wed Oct  8 07:05:12 2014

Optimize a model with 61257 rows, 61256 columns and 183274 nonzeros
Presolve time: 1.64s
Presolved: 61257 rows, 61256 columns, 183274 nonzeros
Variable types: 0 continuous, 61256 integer (61256 binary)
Found heuristic solution: objective 23.9140758

Root relaxation: objective 1.612906e+01, 3164 iterations, 0.54 seconds

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

*    0     0               0      16.1290612   16.12906  0.00%     -    2s

Explored 0 nodes (3164 simplex iterations) in 2.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.612906124418e+01, best bound 1.612906124418e+01, gap 0.0%