Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:27 2012

Optimize a model with 555 rows, 540 columns and 1783 nonzeros
Presolve removed 40 rows and 25 columns
Presolve time: 0.00s
Presolved: 515 rows, 515 columns, 1683 nonzeros
Variable types: 345 continuous, 170 integer (170 binary)

Root relaxation: objective 5.021483e+04, 258 iterations, 0.00 seconds

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

     0     0 50214.8285    0   88          - 50214.8285     -      -    0s
H    0     0                    79636.000000 50214.8285  36.9%     -    0s
     0     0 59180.2027    0   10 79636.0000 59180.2027  25.7%     -    0s
H    0     0                    63254.640039 59180.2027  6.44%     -    0s
     0     0 59322.2374    0    6 63254.6400 59322.2374  6.22%     -    0s
     0     0 59424.1515    0    2 63254.6400 59424.1515  6.06%     -    0s
H    0     0                    59906.000000 59424.1515  0.80%     -    0s
     0     0 59430.9073    0    4 59906.0000 59430.9073  0.79%     -    0s
H    0     0                    59483.000000 59430.9073  0.09%     -    0s
     0     2 59443.8813    0    4 59483.0000 59443.8813  0.07%     -    0s
*   35     4               3    59474.000000 59455.3814  0.03%   2.0    0s

Cutting planes:
  Gomory: 11
  Cover: 3
  Flow cover: 44
  Flow path: 35

Explored 38 nodes (446 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.947400000000e+04, best bound 5.947067212433e+04, gap 0.0056%