Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:10:49 2013

Optimize a model with 550 rows, 25050 columns and 50050 nonzeros
Presolve time: 0.03s
Presolved: 550 rows, 25050 columns, 50050 nonzeros
Variable types: 25000 continuous, 50 integer (50 binary)

Root relaxation: objective 4.623345e+04, 795 iterations, 0.02 seconds

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

     0     0 46233.4469    0    7          - 46233.4469     -      -    0s
H    0     0                    47288.000000 46233.4469  2.23%     -    0s
H    0     0                    46516.000000 46233.4469  0.61%     -    0s
     0     0 46371.7437    0    3 46516.0000 46371.7437  0.31%     -    0s
     0     0 46371.7437    0    7 46516.0000 46371.7437  0.31%     -    0s
     0     0 46371.7437    0    3 46516.0000 46371.7437  0.31%     -    0s
     0     0 46374.9090    0    6 46516.0000 46374.9090  0.30%     -    0s
     0     0 46375.3372    0    3 46516.0000 46375.3372  0.30%     -    0s
     0     0 46375.3372    0    3 46516.0000 46375.3372  0.30%     -    0s
     0     2 46375.9065    0    3 46516.0000 46375.9065  0.30%     -    0s
H    7     4                    46477.000000 46450.1217  0.06%  26.7    0s
*    8     4               7    46471.000000 46450.1217  0.04%  25.4    0s

Cutting planes:
  Implied bound: 58
  Flow cover: 5

Explored 12 nodes (2024 simplex iterations) in 0.57 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.647100000000e+04, best bound 4.647100000000e+04, gap 0.0%