Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:12:56 2012

Optimize a model with 1682 rows, 1681 columns and 7527 nonzeros
Presolve removed 1288 rows and 884 columns
Presolve time: 0.02s
Presolved: 394 rows, 797 columns, 3899 nonzeros
Variable types: 38 continuous, 759 integer (759 binary)

Root relaxation: objective 4.013165e+02, 143 iterations, 0.00 seconds

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

     0     0  401.31645    0   52          -  401.31645     -      -    0s
     0     0  422.63940    0   57          -  422.63940     -      -    0s
     0     0  428.10000    0   55          -  428.10000     -      -    0s
     0     0  428.10000    0   37          -  428.10000     -      -    0s
     0     0  428.10000    0   37          -  428.10000     -      -    0s
     0     0  428.10000    0   37          -  428.10000     -      -    0s
     0     0  428.10000    0   37          -  428.10000     -      -    0s
     0     2  428.10000    0   37          -  428.10000     -      -    0s
* 1051   439              38     458.0000000  441.57037  3.59%  14.3    3s
* 1572   417              37     456.0000000  444.58571  2.50%  14.5    4s
H 1578   367                     453.0000000  444.74947  1.82%  14.6    4s

Cutting planes:
  Learned: 1
  Gomory: 7
  Cover: 43
  Implied bound: 46
  Clique: 6
  MIR: 35
  GUB cover: 6
  Zero half: 49

Explored 1802 nodes (26643 simplex iterations) in 4.80 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.530000000000e+02, best bound 4.530000000000e+02, gap 0.0%