Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:53:35 2013

Optimize a model with 15225 rows, 2025 columns and 46575 nonzeros
Presolve removed 1437 rows and 1023 columns
Presolve time: 0.10s
Presolved: 13788 rows, 1002 columns, 42288 nonzeros
Variable types: 22 continuous, 980 integer (980 binary)
Found heuristic solution: objective 35888.000000

Root relaxation: objective 2.725788e+04, 4999 iterations, 0.22 seconds

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

     0     0 27257.8804    0   15 35888.0000 27257.8804  24.0%     -    0s
H    0     0                    27276.000000 27257.8804  0.07%     -    0s
H    0     0                    27274.000000 27257.8804  0.06%     -    0s
H    0     0                    27268.000000 27257.8804  0.04%     -    0s
     0     0 27257.9091    0   19 27268.0000 27257.9091  0.04%     -    0s
     0     0 27257.9091    0   13 27268.0000 27257.9091  0.04%     -    0s
     0     0 27257.9091    0   16 27268.0000 27257.9091  0.04%     -    0s
     0     2 27257.9091    0   16 27268.0000 27257.9091  0.04%     -    0s
H    1     2                    27267.000000 27257.9091  0.03%  19.0    0s
H   11     8                    27265.000000 27258.4363  0.02%   1.7    0s
H   14     9                    27264.000000 27258.4700  0.02%   1.4    0s
H   14     8                    27263.000000 27258.4700  0.02%   1.4    0s
H   42    18                    27262.000000 27258.9164  0.01%  68.4    1s

Cutting planes:
  Gomory: 12
  Cover: 7
  Implied bound: 1
  MIR: 50
  Zero half: 15

Explored 128 nodes (12579 simplex iterations) in 1.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.726200000000e+04, best bound 2.726000000000e+04, gap 0.0073%