Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:03:40 2013

Optimize a model with 4140 rows, 5020 columns and 18010 nonzeros
Presolve removed 30 rows and 20 columns
Presolve time: 0.20s
Presolved: 4110 rows, 5000 columns, 13980 nonzeros
Variable types: 3010 continuous, 1990 integer (1990 binary)

Root relaxation: objective 1.836170e+04, 1330 iterations, 0.03 seconds

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

     0     0 18361.7044    0    1          - 18361.7044     -      -    0s
     0     0 18381.2294    0    1          - 18381.2294     -      -    0s
     0     0 18381.2294    0    1          - 18381.2294     -      -    0s
     0     0 18383.0668    0    1          - 18383.0668     -      -    0s
     0     0 18383.8229    0    1          - 18383.8229     -      -    0s
     0     2 18385.0596    0    1          - 18385.0596     -      -    0s
*   88    88              69    18442.711880 18394.3199  0.26%  47.2    1s
*   90    84              68    18442.355551 18394.3199  0.26%  46.3    1s
H  119    34                    18418.364350 18395.7876  0.12%  36.7    1s
*  127    32              31    18418.266230 18395.7876  0.12%  34.6    1s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 459 nodes (7185 simplex iterations) in 2.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.841826622999e+04, best bound 1.841646226045e+04, gap 0.0098%