Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:06 2013

Optimize a model with 17343 rows, 2209 columns and 53016 nonzeros
Presolve removed 1933 rows and 1127 columns
Presolve time: 0.08s
Presolved: 15410 rows, 1082 columns, 47110 nonzeros
Variable types: 20 continuous, 1062 integer (1062 binary)
Found heuristic solution: objective 38558.000000

Root relaxation: objective 2.792919e+04, 5517 iterations, 0.27 seconds

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

     0     0 27929.1889    0   18 38558.0000 27929.1889  27.6%     -    0s
H    0     0                    27951.000000 27929.1889  0.08%     -    0s
H    0     0                    27943.000000 27929.1889  0.05%     -    0s
     0     0 27930.5938    0   26 27943.0000 27930.5938  0.04%     -    0s
     0     0 27930.5938    0   16 27943.0000 27930.5938  0.04%     -    0s
     0     0 27930.6522    0   29 27943.0000 27930.6522  0.04%     -    0s
H    0     0                    27942.000000 27930.6522  0.04%     -    0s
     0     0 27931.2694    0   37 27942.0000 27931.2694  0.04%     -    0s
     0     2 27931.7153    0   37 27942.0000 27931.7153  0.04%     -    0s
H    1     2                    27939.000000 27931.7153  0.03%   0.0    0s
H  115    19                    27937.000000 27933.9709  0.01%  16.3    0s

Cutting planes:
  Gomory: 7
  Cover: 1
  MIR: 29
  Zero half: 16

Explored 174 nodes (10375 simplex iterations) in 0.98 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.793700000000e+04, best bound 2.793500000000e+04, gap 0.0072%