Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:20 2013

Optimize a model with 1280 rows, 7040 columns and 16020 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.07s
Presolved: 1240 rows, 6980 columns, 13960 nonzeros
Variable types: 6000 continuous, 980 integer (980 binary)

Root relaxation: objective 4.642213e+04, 550 iterations, 0.01 seconds

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

     0     0 46422.1265    0    3          - 46422.1265     -      -    0s
     0     0 46432.4932    0    4          - 46432.4932     -      -    0s
     0     0 46433.2647    0    4          - 46433.2647     -      -    0s
     0     0 46433.2669    0    4          - 46433.2669     -      -    0s
     0     0 46433.2669    0    4          - 46433.2669     -      -    0s
     0     0 46433.2669    0    4          - 46433.2669     -      -    0s
H    0     0                    51892.475800 46433.2669  10.5%     -    0s
     0     2 46437.0293    0    4 51892.4758 46437.0293  10.5%     -    0s
H   54    54                    47251.321495 46462.8327  1.67%   6.1    0s
H  216    84                    47245.264458 46462.8327  1.66%   2.5    1s
*  227    55             224    47204.464344 46462.8327  1.57%   2.5    1s
*  243    34              21    46749.553156 46477.2047  0.58%   3.2    1s
*  637   153              35    46743.774076 46555.4245  0.40%   9.1    2s
  1969   116     cutoff   28      46743.7741 46677.4222  0.14%   9.0    5s

Cutting planes:
  Gomory: 2
  Flow cover: 5

Explored 2167 nodes (20460 simplex iterations) in 5.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.674377407618e+04, best bound 4.673911535459e+04, gap 0.0100%