Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:26:41 2014

Optimize a model with 421 rows, 420 columns and 1220 nonzeros
Presolve time: 0.00s
Presolved: 421 rows, 420 columns, 1220 nonzeros
Variable types: 0 continuous, 420 integer (420 binary)
Found heuristic solution: objective 7.7808011
Found heuristic solution: objective 5.5398535

Root relaxation: objective 4.972735e+00, 253 iterations, 0.00 seconds

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

*    0     0               0       4.9727347    4.97273  0.00%     -    0s

Explored 0 nodes (253 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.972734710060e+00, best bound 4.972734710060e+00, gap 0.0%