Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:55:52 2013

Optimize a model with 4089 rows, 841 columns and 12615 nonzeros
Presolve removed 556 rows and 427 columns
Presolve time: 0.03s
Presolved: 3533 rows, 414 columns, 10937 nonzeros
Variable types: 13 continuous, 401 integer (401 binary)
Found heuristic solution: objective 20414.000000

Root relaxation: objective 1.593363e+04, 2884 iterations, 0.06 seconds

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

     0     0 15933.6296    0    8 20414.0000 15933.6296  21.9%     -    0s
H    0     0                    15971.000000 15933.6296  0.23%     -    0s
H    0     0                    15954.000000 15933.6296  0.13%     -    0s
H    0     0                    15949.000000 15933.6296  0.10%     -    0s
     0     0 15935.8699    0   20 15949.0000 15935.8699  0.08%     -    0s
     0     0 15935.8699    0    8 15949.0000 15935.8699  0.08%     -    0s
     0     0 15936.5677    0   18 15949.0000 15936.5677  0.08%     -    0s
     0     1 15936.5687    0   18 15949.0000 15936.5687  0.08%     -    0s
H    1     1                    15942.000000 15936.5687  0.03%   0.0    0s

Cutting planes:
  Gomory: 7
  Cover: 2
  Implied bound: 1
  Clique: 1
  MIR: 11
  Zero half: 1

Explored 6 nodes (3219 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.594200000000e+04, best bound 1.594100000000e+04, gap 0.0063%