Gurobi 5.6.3 (linux64) logging started Tue Oct  7 23:41:31 2014

Optimize a model with 21171 rows, 21170 columns and 63220 nonzeros
Presolve time: 0.46s
Presolved: 21171 rows, 21170 columns, 63220 nonzeros
Variable types: 0 continuous, 21170 integer (21170 binary)
Found heuristic solution: objective 18.2492476

Root relaxation: objective 1.186358e+01, 2052 iterations, 0.18 seconds

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

*    0     0               0      11.8635797   11.86358  0.00%     -    0s

Explored 0 nodes (2052 simplex iterations) in 0.69 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.186357969307e+01, best bound 1.186357969307e+01, gap 0.0%