Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:13:53 2013

Optimize a model with 20140 rows, 21020 columns and 82010 nonzeros
Presolve removed 30 rows and 20 columns
Presolve time: 0.28s
Presolved: 20110 rows, 21000 columns, 61980 nonzeros
Variable types: 11010 continuous, 9990 integer (9990 binary)

Root relaxation: objective 1.791602e+04, 7176 iterations, 0.34 seconds

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

     0     0 17916.0191    0    3          - 17916.0191     -      -    0s
H    0     0                    18054.870723 17916.0191  0.77%     -    1s
     0     0 17963.5567    0    4 18054.8707 17963.5567  0.51%     -    1s
     0     0 17963.5567    0    3 18054.8707 17963.5567  0.51%     -    2s
     0     0 17963.5567    0    4 18054.8707 17963.5567  0.51%     -    2s
     0     0 17979.2750    0    4 18054.8707 17979.2750  0.42%     -    2s
H    0     0                    17985.885877 17979.2750  0.04%     -    2s
     0     0 17979.5031    0    6 17985.8859 17979.5031  0.04%     -    2s
     0     1 17979.5065    0    6 17985.8859 17979.5065  0.04%     -    2s
*  198    74             103    17984.954853 17984.0096  0.01%  48.7    4s

Cutting planes:
  Gomory: 4
  Flow cover: 4

Explored 199 nodes (22442 simplex iterations) in 4.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.798495485260e+04, best bound 1.798400964399e+04, gap 0.0053%