Gurobi 5.6.3 (linux64) logging started Tue Oct  7 23:04:50 2014

Optimize a model with 18091 rows, 18090 columns and 54002 nonzeros
Presolve time: 0.35s
Presolved: 18091 rows, 18090 columns, 54002 nonzeros
Variable types: 0 continuous, 18090 integer (18090 binary)
Found heuristic solution: objective 16.4088821

Root relaxation: objective 1.172160e+01, 1632 iterations, 0.12 seconds

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

*    0     0               0      11.7215993   11.72160  0.00%     -    0s

Explored 0 nodes (1632 simplex iterations) in 0.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.172159926863e+01, best bound 1.172159926863e+01, gap 0.0%