Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:39:43 2014

Optimize a model with 4423 rows, 4422 columns and 13134 nonzeros
Presolve time: 0.10s
Presolved: 4423 rows, 4422 columns, 13134 nonzeros
Variable types: 0 continuous, 4422 integer (4422 binary)
Found heuristic solution: objective 16.6606915

Root relaxation: objective 8.781871e+00, 866 iterations, 0.03 seconds

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

*    0     0               0       8.7818707    8.78187  0.00%     -    0s

Explored 0 nodes (866 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.781870718011e+00, best bound 8.781870718011e+00, gap 0.0%