Gurobi 5.6.3 (linux64) logging started Tue Oct  7 20:26:51 2014

Optimize a model with 553 rows, 552 columns and 1610 nonzeros
Presolve time: 0.01s
Presolved: 553 rows, 552 columns, 1610 nonzeros
Variable types: 0 continuous, 552 integer (552 binary)
Found heuristic solution: objective 6.1343418

Root relaxation: objective 4.557681e+00, 228 iterations, 0.00 seconds

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

*    0     0               0       4.5576814    4.55768  0.00%     -    0s

Explored 0 nodes (228 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.557681354084e+00, best bound 4.557681354084e+00, gap 0.0%