Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:52:58 2014

Optimize a model with 6643 rows, 6642 columns and 19764 nonzeros
Presolve time: 0.14s
Presolved: 6643 rows, 6642 columns, 19764 nonzeros
Variable types: 0 continuous, 6642 integer (6642 binary)
Found heuristic solution: objective 12.1864237

Root relaxation: objective 8.477772e+00, 852 iterations, 0.03 seconds

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

*    0     0               0       8.4777724    8.47777  0.00%     -    0s

Explored 0 nodes (852 simplex iterations) in 0.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.477772434492e+00, best bound 8.477772434492e+00, gap 0.0%