Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:07:38 2013

Optimize a model with 46988 rows, 46308 columns and 185028 nonzeros
Presolve removed 3899 rows and 0 columns
Presolve time: 0.28s
Presolved: 43089 rows, 46308 columns, 177230 nonzeros
Variable types: 46240 continuous, 68 integer (68 binary)

Root relaxation: objective 7.983527e+04, 9747 iterations, 1.56 seconds

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

     0     0 79835.2700    0    4          - 79835.2700     -      -    1s
H    0     0                    81329.000000 79835.2700  1.84%     -    2s
     0     0 79840.4785    0    6 81329.0000 79840.4785  1.83%     -    2s
     0     0 79840.8654    0    6 81329.0000 79840.8654  1.83%     -    2s
H    0     0                    80189.000000 79840.8654  0.43%     -    4s
     0     0 79840.8654    0    4 80189.0000 79840.8654  0.43%     -    5s
     0     0 79843.5182    0    5 80189.0000 79843.5182  0.43%     -    5s
     0     2 79845.2406    0    5 80189.0000 79845.2406  0.43%     -    6s
*    4     4               3    80055.000000 80017.2417  0.05%   153    7s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 9 nodes (14753 simplex iterations) in 7.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.005500000000e+04, best bound 8.005500000000e+04, gap 0.0%