Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:39:01 2014

Optimize a model with 4291 rows, 4290 columns and 12740 nonzeros
Presolve time: 0.10s
Presolved: 4291 rows, 4290 columns, 12740 nonzeros
Variable types: 0 continuous, 4290 integer (4290 binary)
Found heuristic solution: objective 13.8874882

Root relaxation: objective 8.673377e+00, 769 iterations, 0.03 seconds

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

*    0     0               0       8.6733774    8.67338  0.00%     -    0s

Explored 0 nodes (769 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.673377393529e+00, best bound 8.673377393529e+00, gap 0.0%