Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:53:59 2013

Optimize a model with 17343 rows, 2209 columns and 53016 nonzeros
Presolve removed 1413 rows and 1111 columns
Presolve time: 0.13s
Presolved: 15930 rows, 1098 columns, 48844 nonzeros
Variable types: 24 continuous, 1074 integer (1074 binary)
Found heuristic solution: objective 43303.000000

Root relaxation: objective 3.136641e+04, 8173 iterations, 0.41 seconds

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

     0     0 31366.4091    0   14 43303.0000 31366.4091  27.6%     -    0s
H    0     0                    31385.000000 31366.4091  0.06%     -    0s
H    0     0                    31379.000000 31366.4091  0.04%     -    0s
     0     0 31366.4091    0   27 31379.0000 31366.4091  0.04%     -    0s
     0     0 31366.4091    0   11 31379.0000 31366.4091  0.04%     -    0s
     0     0 31366.4091    0   29 31379.0000 31366.4091  0.04%     -    1s
H    0     0                    31377.000000 31366.4091  0.03%     -    1s
     0     2 31366.4091    0   24 31377.0000 31366.4091  0.03%     -    1s
H    1     2                    31376.000000 31366.4091  0.03%  85.0    1s
H   72    26                    31374.000000 31368.9267  0.02%  31.6    1s
H   99    26                    31373.000000 31368.9298  0.01%  32.1    1s

Cutting planes:
  Gomory: 9
  Cover: 2
  MIR: 30
  Zero half: 10

Explored 100 nodes (14642 simplex iterations) in 1.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.137300000000e+04, best bound 3.137000000000e+04, gap 0.0096%