Gurobi 5.6.3 (linux64) logging started Wed Oct  8 01:08:00 2014

Optimize a model with 31507 rows, 31506 columns and 94164 nonzeros
Presolve time: 0.77s
Presolved: 31507 rows, 31506 columns, 94164 nonzeros
Variable types: 0 continuous, 31506 integer (31506 binary)
Found heuristic solution: objective 20.5984197

Root relaxation: objective 1.357541e+01, 2195 iterations, 0.23 seconds

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

*    0     0               0      13.5754089   13.57541  0.00%     -    1s

Explored 0 nodes (2195 simplex iterations) in 1.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.357540887943e+01, best bound 1.357540887943e+01, gap 0.0%