Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:57 2013

Optimize a model with 2280 rows, 6040 columns and 16020 nonzeros
Presolve removed 60 rows and 40 columns
Presolve time: 0.09s
Presolved: 2220 rows, 6000 columns, 13960 nonzeros
Variable types: 5020 continuous, 980 integer (980 binary)

Root relaxation: objective 4.636776e+04, 1028 iterations, 0.02 seconds

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

     0     0 46367.7551    0    2          - 46367.7551     -      -    0s
     0     0 46455.9561    0    2          - 46455.9561     -      -    0s
     0     0 46474.4840    0    4          - 46474.4840     -      -    0s
     0     0 46493.1718    0    4          - 46493.1718     -      -    0s
     0     0 46499.8970    0    3          - 46499.8970     -      -    0s
     0     0 46510.8970    0    3          - 46510.8970     -      -    0s
     0     0 46510.8970    0    3          - 46510.8970     -      -    0s
     0     0 46510.8970    0    3          - 46510.8970     -      -    0s
H    0     0                    50513.076673 46510.8970  7.92%     -    0s
     0     2 46511.1965    0    3 50513.0767 46511.1965  7.92%     -    0s
H   17    17                    46725.032639 46564.4780  0.34%  13.2    0s
*   18    13              16    46723.687682 46564.4780  0.34%  14.6    0s
H   36    16                    46654.891362 46565.3513  0.19%  12.3    0s
*   37    16              15    46653.826105 46565.3513  0.19%  13.1    0s

Cutting planes:
  Gomory: 2
  Flow cover: 9

Explored 136 nodes (2598 simplex iterations) in 1.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.665382610478e+04, best bound 4.664926097880e+04, gap 0.0098%