Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:22 2013

Optimize a model with 52 rows, 158 columns and 924 nonzeros
Presolve removed 22 rows and 24 columns
Presolve time: 0.00s
Presolved: 30 rows, 134 columns, 778 nonzeros
Variable types: 122 continuous, 12 integer (12 binary)

Root relaxation: objective 4.810927e+03, 14 iterations, 0.00 seconds

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

     0     0 4810.92679    0    6          - 4810.92679     -      -    0s
     0     0 4815.96406    0    8          - 4815.96406     -      -    0s
     0     0 4815.98267    0    8          - 4815.98267     -      -    0s
     0     0 4830.16094    0    6          - 4830.16094     -      -    0s
     0     0 4830.63573    0    6          - 4830.63573     -      -    0s
H    0     0                    4837.6791047 4830.63573  0.15%     -    0s
     0     0 4830.85463    0    2 4837.67910 4830.85463  0.14%     -    0s
     0     0 4830.95630    0    4 4837.67910 4830.95630  0.14%     -    0s
     0     0 4830.95630    0    4 4837.67910 4830.95630  0.14%     -    0s
H    0     0                    4831.3249010 4830.95630  0.01%     -    0s

Cutting planes:
  Gomory: 2
  Flow cover: 1

Explored 0 nodes (88 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831324901037e+03, best bound 4.830956303747e+03, gap 0.0076%