Gurobi 5.0.1 (linux64) logging started Sun Dec  9 10:43:33 2012

Optimize a model with 3000 rows, 2970 columns and 11303 nonzeros
Presolve removed 141 rows and 47 columns
Presolve time: 0.02s
Presolved: 2859 rows, 2923 columns, 11007 nonzeros
Variable types: 2746 continuous, 177 integer (177 binary)

Root relaxation: objective 5.421678e+04, 309 iterations, 0.01 seconds

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

     0     0 54216.7802    0   25          - 54216.7802     -      -    0s
     0     0 54285.7087    0   23          - 54285.7087     -      -    0s
     0     0 54337.9482    0   28          - 54337.9482     -      -    0s
     0     0 54361.4424    0   38          - 54361.4424     -      -    0s
     0     0 54365.6680    0   41          - 54365.6680     -      -    0s
     0     0 54366.6003    0   43          - 54366.6003     -      -    0s
     0     0 54367.1754    0   41          - 54367.1754     -      -    0s
     0     0 54368.4529    0   43          - 54368.4529     -      -    0s
H    0     0                    59138.000000 54368.4529  8.07%     -    0s
H    0     0                    55427.000000 54368.4529  1.91%     -    0s
     0     2 54405.9268    0   43 55427.0000 54405.9268  1.84%     -    0s
H 2108   448                    55405.000000 55034.7711  0.67%   8.0    2s
  5150    83     cutoff   34      55405.0000 55372.0691  0.06%   6.8    5s

Cutting planes:
  Gomory: 2
  Flow cover: 14

Explored 5236 nodes (35916 simplex iterations) in 5.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.540500000000e+04, best bound 5.539954581734e+04, gap 0.0098%