Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:47:25 2013

Optimize a model with 41664 rows, 41024 columns and 163904 nonzeros
Presolve removed 3463 rows and 0 columns
Presolve time: 0.25s
Presolved: 38201 rows, 41024 columns, 156978 nonzeros
Variable types: 40960 continuous, 64 integer (64 binary)

Root relaxation: objective 8.047249e+04, 10231 iterations, 1.64 seconds

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

     0     0 80472.4913    0    2          - 80472.4913     -      -    2s
H    0     0                    80917.000000 80472.4913  0.55%     -    2s
     0     0 80474.0045    0    3 80917.0000 80474.0045  0.55%     -    2s
H    0     0                    80846.375000 80474.0045  0.46%     -    3s
H    0     0                    80598.000000 80474.0045  0.15%     -    3s
     0     0 80474.0045    0    2 80598.0000 80474.0045  0.15%     -    4s
     0     0 80474.0045    0    3 80598.0000 80474.0045  0.15%     -    4s
     0     0 80557.3750    0    1 80598.0000 80557.3750  0.05%     -    4s
H    0     0                    80576.000000 80557.3750  0.02%     -    4s
     0     2 80557.4444    0    1 80576.0000 80557.4444  0.02%     -    5s

Cutting planes:
  Flow cover: 1

Explored 2 nodes (14050 simplex iterations) in 5.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.057600000000e+04, best bound 8.057591891892e+04, gap 0.0001%