Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:57:16 2013

Optimize a model with 30913 rows, 3249 columns and 94221 nonzeros
Presolve removed 1951 rows and 1629 columns
Presolve time: 0.21s
Presolved: 28962 rows, 1620 columns, 88506 nonzeros
Variable types: 30 continuous, 1590 integer (1590 binary)
Found heuristic solution: objective 61340.000000

Root relaxation: objective 4.134446e+04, 12669 iterations, 0.85 seconds

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

     0     0 41344.4615    0    8 61340.0000 41344.4615  32.6%     -    1s
H    0     0                    41362.000000 41344.4615  0.04%     -    1s
H    0     0                    41359.000000 41344.4615  0.04%     -    1s
H    0     0                    41352.000000 41344.4615  0.02%     -    1s
     0     0 41344.4615    0   13 41352.0000 41344.4615  0.02%     -    1s
     0     0 41344.4615    0   11 41352.0000 41344.4615  0.02%     -    1s
     0     0 41344.4615    0   28 41352.0000 41344.4615  0.02%     -    1s
     0     2 41344.4615    0   13 41352.0000 41344.4615  0.02%     -    1s
H    4     4                    41349.000000 41344.4615  0.01%   6.5    1s
H    7     6                    41347.000000 41344.4615  0.01%   3.7    1s

Cutting planes:
  MIR: 2
  Zero half: 2

Explored 7 nodes (16566 simplex iterations) in 1.77 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.134700000000e+04, best bound 4.134500000000e+04, gap 0.0048%