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

Optimize a model with 56 rows, 570 columns and 4110 nonzeros
Presolve removed 22 rows and 135 columns
Presolve time: 0.01s
Presolved: 34 rows, 435 columns, 3668 nonzeros
Variable types: 421 continuous, 14 integer (14 binary)

Root relaxation: objective 7.444602e+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 7444.60178    0    4          - 7444.60178     -      -    0s
     0     0 7447.26552    0    4          - 7447.26552     -      -    0s
     0     0 7447.30919    0    4          - 7447.30919     -      -    0s
     0     0 7447.30919    0    4          - 7447.30919     -      -    0s
H    0     0                    7489.9795505 7447.30919  0.57%     -    0s
     0     0 7459.10697    0    2 7489.97955 7459.10697  0.41%     -    0s
*    0     0               0    7459.1516945 7459.15169   0.0%     -    0s

Cutting planes:
  Gomory: 2
  Cover: 1
  Implied bound: 1
  Flow cover: 7

Explored 0 nodes (65 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.459151694455e+03, best bound 7.459151694455e+03, gap 0.0%