Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:03:11 2013

Optimize a model with 54809 rows, 4761 columns and 166635 nonzeros
Presolve removed 7686 rows and 2479 columns
Presolve time: 0.44s
Presolved: 47123 rows, 2282 columns, 142817 nonzeros
Variable types: 22 continuous, 2260 integer (2260 binary)
Found heuristic solution: objective 92691.000000

Root relaxation: objective 7.131720e+04, 12395 iterations, 1.09 seconds

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

     0     0 71317.2000    0   13 92691.0000 71317.2000  23.1%     -    1s
H    0     0                    71361.000000 71317.2000  0.06%     -    1s
H    0     0                    71326.000000 71317.2000  0.01%     -    1s
H    0     0                    71324.000000 71317.2000  0.01%     -    1s

Explored 0 nodes (12547 simplex iterations) in 1.84 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.132400000000e+04, best bound 7.131800000000e+04, gap 0.0084%