Gurobi 5.6.3 (linux64) logging started Wed Oct  8 06:28:47 2014

Optimize a model with 58807 rows, 58806 columns and 175934 nonzeros
Presolve time: 1.54s
Presolved: 58807 rows, 58806 columns, 175934 nonzeros
Variable types: 0 continuous, 58806 integer (58806 binary)
Found heuristic solution: objective 23.8911069

Root relaxation: objective 1.556735e+01, 2980 iterations, 0.54 seconds

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

*    0     0               0      15.5673487   15.56735  0.00%     -    2s

Explored 0 nodes (2980 simplex iterations) in 2.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.556734870545e+01, best bound 1.556734870545e+01, gap 0.0%