Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:36 2013

Optimize a model with 50183 rows, 4489 columns and 152626 nonzeros
Presolve removed 5151 rows and 2297 columns
Presolve time: 0.37s
Presolved: 45032 rows, 2192 columns, 136823 nonzeros
Variable types: 27 continuous, 2165 integer (2165 binary)
Found heuristic solution: objective 91674.000000

Root relaxation: objective 7.115763e+04, 13294 iterations, 1.19 seconds

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

     0     0 71157.6316    0   15 91674.0000 71157.6316  22.4%     -    1s
H    0     0                    71181.000000 71157.6316  0.03%     -    1s
H    0     0                    71170.000000 71157.6316  0.02%     -    1s
     0     0 71158.0000    0   19 71170.0000 71158.0000  0.02%     -    1s
     0     0 71158.0000    0    7 71170.0000 71158.0000  0.02%     -    2s
H    0     0                    71165.000000 71158.0000  0.01%     -    2s

Explored 0 nodes (15748 simplex iterations) in 2.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.116500000000e+04, best bound 7.115800000000e+04, gap 0.0098%