Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:08:45 2013

Optimize a model with 24549 rows, 24059 columns and 96089 nonzeros
Presolve removed 1697 rows and 0 columns
Presolve time: 0.13s
Presolved: 22852 rows, 24059 columns, 92695 nonzeros
Variable types: 24010 continuous, 49 integer (49 binary)

Root relaxation: objective 4.873838e+04, 4406 iterations, 0.48 seconds

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

     0     0 48738.3846    0    1          - 48738.3846     -      -    0s
H    0     0                    49068.000000 48738.3846  0.67%     -    0s
     0     0 48739.8227    0    2 49068.0000 48739.8227  0.67%     -    0s
     0     0 48739.8227    0    2 49068.0000 48739.8227  0.67%     -    0s
     0     2 48754.7921    0    2 49068.0000 48754.7921  0.64%     -    1s
H   17     5                    49008.520000 48922.3613  0.18%  55.6    2s
H   19     4                    48986.483871 48932.8387  0.11%  52.3    2s
*   20     3               8    48941.000000 48932.8387  0.02%  51.0    2s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 24 nodes (5462 simplex iterations) in 2.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.894100000000e+04, best bound 4.894100000000e+04, gap 0.0%