Gurobi 5.6.3 (linux64) logging started Wed Oct  8 05:39:58 2014

Optimize a model with 55461 rows, 55460 columns and 165910 nonzeros
Presolve time: 1.49s
Presolved: 55461 rows, 55460 columns, 165910 nonzeros
Variable types: 0 continuous, 55460 integer (55460 binary)
Found heuristic solution: objective 22.7460555

Root relaxation: objective 1.523993e+01, 3020 iterations, 0.49 seconds

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

*    0     0               0      15.2399285   15.23993  0.00%     -    2s

Explored 0 nodes (3020 simplex iterations) in 2.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.523992851464e+01, best bound 1.523992851464e+01, gap 0.0%