Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:30 2013

Optimize a model with 2032 rows, 4046 columns and 14090 nonzeros
Presolve removed 23 rows and 163 columns
Presolve time: 0.17s
Presolved: 2009 rows, 3883 columns, 11628 nonzeros
Variable types: 2021 continuous, 1862 integer (1862 binary)

Root relaxation: objective 4.812930e+03, 16 iterations, 0.00 seconds

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

     0     0 4812.92988    0    2          - 4812.92988     -      -    0s
     0     0 4813.45384    0    4          - 4813.45384     -      -    0s
     0     0 4817.94175    0    3          - 4817.94175     -      -    0s
     0     0 4819.17583    0    3          - 4819.17583     -      -    0s
     0     0 4819.55830    0    3          - 4819.55830     -      -    0s
     0     0 4819.61721    0    5          - 4819.61721     -      -    0s
     0     0 4819.78324    0    5          - 4819.78324     -      -    0s
H    0     0                    4832.0715183 4819.78324  0.25%     -    1s
     0     2 4819.78324    0    5 4832.07152 4819.78324  0.25%     -    1s
H  459     8                    4831.1212106 4831.12105  0.00%  10.8    5s

Cutting planes:
  Gomory: 1
  Cover: 3
  Flow cover: 1

Explored 459 nodes (5049 simplex iterations) in 5.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831121210610e+03, best bound 4.831121047951e+03, gap 0.0000%