Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:44 2013

Optimize a model with 23616 rows, 23136 columns and 92256 nonzeros
Presolve removed 48 rows and 0 columns
Presolve time: 0.10s
Presolved: 23568 rows, 23136 columns, 92208 nonzeros
Variable types: 23088 continuous, 48 integer (48 binary)

Root relaxation: objective 4.126337e+04, 2852 iterations, 0.81 seconds

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

     0     0 41263.3674    0   38          - 41263.3674     -      -    1s
H    0     0                    54444.000000 41263.3674  24.2%     -    1s
     0     0 48980.3374    0    4 54444.0000 48980.3374  10.0%     -    2s
H    0     0                    51401.816880 48980.3374  4.71%     -    2s
H    0     0                    51000.000000 48980.3374  3.96%     -    2s
H    0     0                    49027.000000 48980.3374  0.10%     -    2s
     0     0 49017.9667    0    3 49027.0000 49017.9667  0.02%     -    2s
H    0     0                    49022.000000 49017.9667  0.01%     -    2s

Cutting planes:
  Implied bound: 40

Explored 0 nodes (4469 simplex iterations) in 2.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.902200000000e+04, best bound 4.901796666667e+04, gap 0.0082%