Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:43 2013

Optimize a model with 28673 rows, 28143 columns and 112413 nonzeros
Presolve removed 2271 rows and 0 columns
Presolve time: 0.16s
Presolved: 26402 rows, 28143 columns, 107871 nonzeros
Variable types: 28090 continuous, 53 integer (53 binary)

Root relaxation: objective 6.672882e+04, 7241 iterations, 0.81 seconds

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

     0     0 66728.8182    0    1          - 66728.8182     -      -    1s
H    0     0                    66748.000000 66728.8182  0.03%     -    1s
     0     0 66729.2748    0    2 66748.0000 66729.2748  0.03%     -    1s
     0     0 66729.2748    0    2 66748.0000 66729.2748  0.03%     -    1s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 0 nodes (7293 simplex iterations) in 1.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.674800000000e+04, best bound 6.674800000000e+04, gap 0.0%