Gurobi 5.6.3 (linux64) logging started Wed Oct  8 05:46:18 2014

Optimize a model with 55933 rows, 55932 columns and 167324 nonzeros
Presolve time: 1.57s
Presolved: 55933 rows, 55932 columns, 167324 nonzeros
Variable types: 0 continuous, 55932 integer (55932 binary)
Found heuristic solution: objective 22.1691882

Root relaxation: objective 1.608337e+01, 3187 iterations, 0.53 seconds

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

*    0     0               0      16.0833703   16.08337  0.00%     -    2s

Explored 0 nodes (3187 simplex iterations) in 2.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.608337034327e+01, best bound 1.608337034327e+01, gap 0.0%