Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:56:46 2013

Optimize a model with 29316 rows, 3136 columns and 89376 nonzeros
Presolve removed 4019 rows and 1624 columns
Presolve time: 0.21s
Presolved: 25297 rows, 1512 columns, 76897 nonzeros
Variable types: 19 continuous, 1493 integer (1493 binary)
Found heuristic solution: objective 69207.000000

Root relaxation: objective 5.756190e+04, 3197 iterations, 0.23 seconds

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

     0     0 57561.9000    0    6 69207.0000 57561.9000  16.8%     -    0s
H    0     0                    57590.000000 57561.9000  0.05%     -    0s
H    0     0                    57577.000000 57561.9000  0.03%     -    0s
H    0     0                    57568.000000 57561.9000  0.01%     -    0s
     0     0 57561.9000    0    8 57568.0000 57561.9000  0.01%     -    0s
     0     0 57561.9000    0    7 57568.0000 57561.9000  0.01%     -    0s
H    0     0                    57567.000000 57561.9000  0.01%     -    0s

Explored 0 nodes (3364 simplex iterations) in 0.80 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.756700000000e+04, best bound 5.756200000000e+04, gap 0.0087%