Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:03:54 2013

Optimize a model with 2140 rows, 7020 columns and 18010 nonzeros
Presolve removed 20 rows and 30 columns
Presolve time: 0.18s
Presolved: 2120 rows, 6990 columns, 13980 nonzeros
Variable types: 5000 continuous, 1990 integer (1990 binary)

Root relaxation: objective 1.791602e+04, 116 iterations, 0.00 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
     0     0 17918.5534    0    4          - 17918.5534     -      -    0s
     0     0 17918.6269    0    4          - 17918.6269     -      -    0s
H    0     0                    18336.027623 17918.6269  2.28%     -    0s
     0     2 17919.2912    0    4 18336.0276 17919.2912  2.27%     -    0s
H  108   108                    18028.892853 17963.6025  0.36%   2.0    0s
H  358   239                    18020.172433 17964.7251  0.31%   2.0    1s
H  688   486                    18008.166044 17966.6357  0.23%   3.9    2s
*  888   370              23    17989.975688 17975.4449  0.08%   3.9    3s
*  965   310              22    17985.769640 17977.3042  0.05%   3.8    3s
* 1077   239              65    17984.235633 17980.4722  0.02%   3.6    4s
* 1078   218              64    17984.224091 17980.4722  0.02%   3.6    4s

Cutting planes:
  Gomory: 3
  Flow cover: 3

Explored 1140 nodes (4850 simplex iterations) in 4.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.798422409141e+04, best bound 1.798246451265e+04, gap 0.0098%