Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:36 2012

Optimize a model with 1635 rows, 1620 columns and 5924 nonzeros
Presolve removed 160 rows and 42 columns
Presolve time: 0.02s
Presolved: 1475 rows, 1578 columns, 5574 nonzeros
Variable types: 1406 continuous, 172 integer (172 binary)

Root relaxation: objective 5.901928e+04, 286 iterations, 0.00 seconds

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

     0     0 59019.2844    0    4          - 59019.2844     -      -    0s
H    0     0                    59219.000000 59019.2844  0.34%     -    0s
     0     0 59028.4122    0   11 59219.0000 59028.4122  0.32%     -    0s
     0     0 59028.4122    0    4 59219.0000 59028.4122  0.32%     -    0s
     0     0 59029.2840    0    8 59219.0000 59029.2840  0.32%     -    0s
     0     0 59031.5242    0   11 59219.0000 59031.5242  0.32%     -    0s
     0     0 59031.5774    0   10 59219.0000 59031.5774  0.32%     -    0s
     0     0 59031.6275    0   11 59219.0000 59031.6275  0.32%     -    0s
     0     0 59031.6833    0   14 59219.0000 59031.6833  0.32%     -    0s
     0     2 59041.0420    0   14 59219.0000 59041.0420  0.30%     -    0s
*   14     8              10    59213.000000 59073.3344  0.24%   7.1    0s
H   27    12                    59194.000000 59075.7576  0.20%   5.1    0s
*   36     8              10    59120.000000 59101.3056  0.03%   5.1    0s

Cutting planes:
  Gomory: 1
  Cover: 1
  Flow cover: 6

Explored 42 nodes (716 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.912000000000e+04, best bound 5.911468015561e+04, gap 0.0090%