Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:03 2013

Optimize a model with 19844 rows, 19404 columns and 77484 nonzeros
Presolve removed 1544 rows and 0 columns
Presolve time: 0.11s
Presolved: 18300 rows, 19404 columns, 74396 nonzeros
Variable types: 19360 continuous, 44 integer (44 binary)

Root relaxation: objective 4.458304e+04, 3203 iterations, 0.28 seconds

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

     0     0 44583.0401    0    3          - 44583.0401     -      -    0s
H    0     0                    45085.000000 44583.0401  1.11%     -    0s
     0     0 44584.8451    0    4 45085.0000 44584.8451  1.11%     -    0s
     0     0 44584.8451    0    4 45085.0000 44584.8451  1.11%     -    0s
     0     0 44584.8451    0    4 45085.0000 44584.8451  1.11%     -    0s
     0     0 44585.0558    0    4 45085.0000 44585.0558  1.11%     -    0s
     0     2 44585.5837    0    4 45085.0000 44585.5837  1.11%     -    1s
H    4     4                    44949.250000 44633.6780  0.70%  49.0    1s
H    6     5                    44873.781250 44633.6780  0.54%  52.3    1s
H    9     7                    44803.826087 44633.6780  0.38%  58.8    1s
*   11     8               8    44774.000000 44633.6780  0.31%  55.9    1s
*   18     3               5    44668.000000 44655.0660  0.03%  40.9    1s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 21 nodes (4040 simplex iterations) in 1.63 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.466800000000e+04, best bound 4.466800000000e+04, gap 0.0%