Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:49:43 2013

Optimize a model with 2280 rows, 10040 columns and 24020 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.19s
Presolved: 2240 rows, 9980 columns, 19960 nonzeros
Variable types: 8000 continuous, 1980 integer (1980 binary)

Root relaxation: objective 4.013975e+04, 402 iterations, 0.01 seconds

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

     0     0 40139.7487    0    2          - 40139.7487     -      -    0s
     0     0 40140.3141    0    3          - 40140.3141     -      -    0s
     0     0 40140.3833    0    4          - 40140.3833     -      -    0s
     0     0 40140.4897    0    4          - 40140.4897     -      -    0s
     0     0 40140.4897    0    4          - 40140.4897     -      -    0s
H    0     0                    40238.726267 40140.4897  0.24%     -    0s
     0     2 40144.1238    0    4 40238.7263 40144.1238  0.24%     -    0s
*   23    23              15    40209.024179 40149.8646  0.15%   4.1    0s
*   57    39              17    40208.958317 40152.3729  0.14%   3.4    0s
H  162   110                    40205.471439 40163.3951  0.10%   3.0    1s
H  324   165                    40205.284596 40173.6095  0.08%   2.7    1s
*  328   156              13    40203.217411 40173.6095  0.07%   2.7    1s
*  510   225              13    40202.508284 40178.8748  0.06%   2.5    2s
H  596   156                    40195.331968 40180.1837  0.04%   2.5    2s
* 1031    67              12    40195.179678 40191.1954  0.01%   2.6    3s

Cutting planes:
  Gomory: 2
  Flow cover: 5

Explored 1032 nodes (3913 simplex iterations) in 3.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019517967753e+04, best bound 4.019119536949e+04, gap 0.0099%