Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:28:54 2014

Optimize a model with 1641 rows, 1640 columns and 4840 nonzeros
Presolve time: 0.02s
Presolved: 1641 rows, 1640 columns, 4840 nonzeros
Variable types: 0 continuous, 1640 integer (1640 binary)
Found heuristic solution: objective 9.2772834

Root relaxation: objective 6.784937e+00, 434 iterations, 0.01 seconds

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

*    0     0               0       6.7849373    6.78494  0.00%     -    0s

Explored 0 nodes (434 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.784937324153e+00, best bound 6.784937324153e+00, gap 0.0%