Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:14 2013

Optimize a model with 18963 rows, 18533 columns and 74003 nonzeros
Presolve removed 1171 rows and 0 columns
Presolve time: 0.11s
Presolved: 17792 rows, 18533 columns, 71661 nonzeros
Variable types: 18490 continuous, 43 integer (43 binary)

Root relaxation: objective 4.692638e+04, 2405 iterations, 0.16 seconds

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

     0     0 46926.3847    0    3          - 46926.3847     -      -    0s
H    0     0                    48216.000000 46926.3847  2.67%     -    0s
H    0     0                    47619.000000 46926.3847  1.45%     -    0s
     0     0 46928.8953    0    5 47619.0000 46928.8953  1.45%     -    0s
H    0     0                    47559.000000 46928.8953  1.32%     -    0s
     0     0 46930.2689    0    5 47559.0000 46930.2689  1.32%     -    0s
H    0     0                    47439.000000 46930.2689  1.07%     -    0s
H    0     0                    46968.000000 46930.2689  0.08%     -    0s
     0     0 46966.1579    0    1 46968.0000 46966.1579  0.00%     -    0s

Explored 0 nodes (3070 simplex iterations) in 0.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.696800000000e+04, best bound 4.696615789474e+04, gap 0.0039%