Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:02:17 2013

Optimize a model with 2420 rows, 484220 columns and 968220 nonzeros
Presolve time: 1.47s
Presolved: 2420 rows, 484220 columns, 968220 nonzeros
Variable types: 484000 continuous, 220 integer (220 binary)

Root relaxation: objective 4.800050e+05, 16009 iterations, 2.29 seconds

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

     0     0 480005.021    0   11          - 480005.021     -      -    4s
H    0     0                    531010.00000 480005.021  9.61%     -    7s
H    0     0                    486361.00000 480005.021  1.31%     -    9s
     0     0 480620.815    0    8 486361.000 480620.815  1.18%     -   10s
     0     0 480620.815    0   11 486361.000 480620.815  1.18%     -   14s
     0     0 480622.680    0    8 486361.000 480622.680  1.18%     -   16s
     0     0 480685.870    0    8 486361.000 480685.870  1.17%     -   17s
     0     0 480713.897    0    8 486361.000 480713.897  1.16%     -   18s
     0     0 480729.332    0    8 486361.000 480729.332  1.16%     -   19s
     0     0 480731.547    0    7 486361.000 480731.547  1.16%     -   20s
     0     0 480733.195    0    7 486361.000 480733.195  1.16%     -   20s
     0     0 480734.443    0    8 486361.000 480734.443  1.16%     -   21s
     0     0 480734.996    0    8 486361.000 480734.996  1.16%     -   22s
     0     0 480735.831    0    8 486361.000 480735.831  1.16%     -   23s
     0     2 480778.492    0    8 486361.000 480778.492  1.15%     -   27s
     4     6 481358.671    3    6 486361.000 480909.484  1.12%   287   30s
H    8     8                    483832.97647 480909.484  0.60%   171   31s
H   10     9                    481610.00000 480909.484  0.15%   144   31s
*   23    12              16    481524.00000 480909.484  0.13%   105   33s
    33    14 481372.558    4    6 481524.000 480913.527  0.13%  96.7   35s
*   50    16              12    481510.00000 480997.326  0.11%   114   38s
    55    19 481336.234    5    4 481510.000 481083.095  0.09%   130   40s
    80    28 481339.118   11    1 481510.000 481125.775  0.08%   135   45s
*   86    22              14    481429.00000 481125.775  0.06%   130   45s
   107    16     cutoff    6      481429.000 481194.629  0.05%   139   50s
   132    14 481417.257    5    2 481429.000 481274.113  0.03%   138   55s

Cutting planes:
  Implied bound: 391
  Flow cover: 12

Explored 151 nodes (53680 simplex iterations) in 58.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.814290000000e+05, best bound 4.814175418552e+05, gap 0.0024%