Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:16 2013

Optimize a model with 428 rows, 444 columns and 1682 nonzeros
Presolve removed 400 rows and 400 columns
Presolve time: 0.01s
Presolved: 28 rows, 44 columns, 124 nonzeros
Variable types: 32 continuous, 12 integer (12 binary)

Root relaxation: objective 4.810927e+03, 19 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    2          - 4810.92679     -      -    0s
     0     0 4828.99419    0    1          - 4828.99419     -      -    0s
H    0     0                    4831.3294332 4828.99419  0.05%     -    0s
     0     0 4831.10652    0    4 4831.32943 4831.10652  0.00%     -    0s

Cutting planes:
  Gomory: 2
  Implied bound: 2
  Flow cover: 5

Explored 0 nodes (40 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831329433210e+03, best bound 4.831106518157e+03, gap 0.0046%