Gurobi 5.0.1 (linux64) logging started Sat Dec  8 02:35:15 2012

Optimize a model with 285 rows, 270 columns and 888 nonzeros
Presolve removed 21 rows and 12 columns
Presolve time: 0.00s
Presolved: 264 rows, 258 columns, 840 nonzeros
Variable types: 171 continuous, 87 integer (87 binary)

Root relaxation: objective 2.314990e+04, 131 iterations, 0.00 seconds

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

     0     0 23149.8978    0   46          - 23149.8978     -      -    0s
H    0     0                    37557.000000 23149.8978  38.4%     -    0s
     0     0 28508.9623    0    4 37557.0000 28508.9623  24.1%     -    0s
     0     0 28538.5169    0    4 37557.0000 28538.5169  24.0%     -    0s
H    0     0                    28597.000000 28538.5169  0.20%     -    0s
     0     0 28538.5169    0   31 28597.0000 28538.5169  0.20%     -    0s
     0     0 28538.5169    0    4 28597.0000 28538.5169  0.20%     -    0s
     0     0 28539.2042    0    4 28597.0000 28539.2042  0.20%     -    0s
     0     2 28539.2875    0    4 28597.0000 28539.2875  0.20%     -    0s

Cutting planes:
  Gomory: 6
  Implied bound: 1
  Flow cover: 16
  Flow path: 9

Explored 22 nodes (502 simplex iterations) in 0.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.859700000000e+04, best bound 2.859700000000e+04, gap 0.0%