Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:42:36 2014

Optimize a model with 4831 rows, 4830 columns and 14352 nonzeros
Presolve time: 0.12s
Presolved: 4831 rows, 4830 columns, 14352 nonzeros
Variable types: 0 continuous, 4830 integer (4830 binary)
Found heuristic solution: objective 12.7246960

Root relaxation: objective 8.546900e+00, 940 iterations, 0.03 seconds

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

*    0     0               0       8.5468999    8.54690  0.00%     -    0s

Explored 0 nodes (940 simplex iterations) in 0.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.546899864413e+00, best bound 8.546899864413e+00, gap 0.0%