Gurobi 5.6.3 (linux64) logging started Wed Oct  8 06:35:39 2014

Optimize a model with 59293 rows, 59292 columns and 177390 nonzeros
Presolve time: 1.66s
Presolved: 59293 rows, 59292 columns, 177390 nonzeros
Variable types: 0 continuous, 59292 integer (59292 binary)
Found heuristic solution: objective 23.9927950

Root relaxation: objective 1.531827e+01, 2950 iterations, 0.51 seconds

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

*    0     0               0      15.3182684   15.31827  0.00%     -    2s

Explored 0 nodes (2950 simplex iterations) in 2.33 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.531826841991e+01, best bound 1.531826841991e+01, gap 0.0%