Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:03:30 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 2.207062e+04, 1587 iterations, 0.02 seconds

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

     0     0 22070.6191    0    1          - 22070.6191     -      -    0s
     0     0 22237.3867    0    1          - 22237.3867     -      -    0s
     0     0 22261.9422    0    1          - 22261.9422     -      -    0s
     0     0 22261.9440    0    2          - 22261.9440     -      -    0s
     0     0 22262.8946    0    2          - 22262.8946     -      -    0s
     0     0 22265.4806    0    2          - 22265.4806     -      -    0s
     0     0 22271.0163    0    1          - 22271.0163     -      -    0s
     0     0 22271.0163    0    1          - 22271.0163     -      -    0s
     0     0 22271.3072    0    2          - 22271.3072     -      -    0s
     0     0 22271.7024    0    2          - 22271.7024     -      -    0s
     0     2 22272.8538    0    2          - 22272.8538     -      -    0s
*   47    45              43    22385.169091 22310.2839  0.33%  13.1    1s
*   48    44              44    22384.793319 22310.2839  0.33%  13.8    1s
H   49    43                    22384.581407 22310.2839  0.33%  13.5    1s
H   76    17                    22333.163337 22310.9357  0.10%  10.8    1s

Cutting planes:
  Gomory: 1
  Flow cover: 8

Explored 91 nodes (3554 simplex iterations) in 1.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.233316333700e+04, best bound 2.233130997697e+04, gap 0.0083%