Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:30 2013

Optimize a model with 1080 rows, 4840 columns and 11220 nonzeros
Presolve removed 60 rows and 40 columns
Presolve time: 0.03s
Presolved: 1020 rows, 4800 columns, 10360 nonzeros
Variable types: 4420 continuous, 380 integer (380 binary)

Root relaxation: objective 4.370285e+04, 863 iterations, 0.01 seconds

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

     0     0 43702.8549    0    2          - 43702.8549     -      -    0s
     0     0 43736.9966    0    1          - 43736.9966     -      -    0s
     0     0 43739.2059    0    1          - 43739.2059     -      -    0s
     0     0 43739.2059    0    1          - 43739.2059     -      -    0s
     0     0 43739.2059    0    1          - 43739.2059     -      -    0s
H    0     0                    48961.740775 43739.2059  10.7%     -    0s
     0     2 43747.6678    0    1 48961.7408 43747.6678  10.6%     -    0s
*   42    35              41    44060.493872 43852.1529  0.47%   9.5    0s
*   44    24              40    44042.190602 43852.1529  0.43%   9.7    0s
H   64    28                    44040.004780 43865.1769  0.40%   9.5    0s
H   66     8                    43922.531222 43878.1255  0.10%  10.1    0s
*   67     4               6    43903.648117 43878.1255  0.06%  10.4    0s
*   71     2               4    43900.745969 43880.4541  0.05%  10.3    0s

Cutting planes:
  Gomory: 2
  Flow cover: 7

Explored 74 nodes (1717 simplex iterations) in 0.48 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390074596881e+04, best bound 4.390074596881e+04, gap 0.0%