Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:37 2013

Optimize a model with 520 rows, 6720 columns and 26260 nonzeros
Presolve removed 20 rows and 580 columns
Presolve time: 0.05s
Presolved: 500 rows, 6140 columns, 24260 nonzeros
Variable types: 6020 continuous, 120 integer (120 binary)

Root relaxation: objective 4.642213e+04, 587 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    9          - 46422.1265     -      -    0s
     0     0 46425.8934    0    6          - 46425.8934     -      -    0s
     0     0 46426.4860    0    6          - 46426.4860     -      -    0s
     0     0 46426.4860    0    6          - 46426.4860     -      -    0s
     0     0 46426.4860    0    6          - 46426.4860     -      -    0s
     0     0 46426.4860    0    6          - 46426.4860     -      -    0s
H    0     0                    47039.307796 46426.4860  1.30%     -    0s
     0     2 46426.4860    0    6 47039.3078 46426.4860  1.30%     -    0s
*   23    17              21    46881.247076 46727.7992  0.33%  12.2    0s
*   39    17              14    46839.521252 46740.4757  0.21%  11.8    0s
*   40    14              14    46837.893971 46740.4757  0.21%  11.5    0s
*   49     7              14    46765.281368 46742.9505  0.05%  10.6    0s
H   54     1                    46743.774076 46742.9505  0.00%   9.7    0s

Cutting planes:
  Flow cover: 3

Explored 54 nodes (1346 simplex iterations) in 0.40 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.674377407618e+04, best bound 4.674295051102e+04, gap 0.0018%