Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:14 2013

Optimize a model with 20790 rows, 20340 columns and 81090 nonzeros
Presolve removed 45 rows and 0 columns
Presolve time: 0.09s
Presolved: 20745 rows, 20340 columns, 81045 nonzeros
Variable types: 20295 continuous, 45 integer (45 binary)

Root relaxation: objective 4.633550e+04, 3161 iterations, 0.67 seconds

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

     0     0 46335.5023    0   34          - 46335.5023     -      -    0s
H    0     0                    57393.000000 46335.5023  19.3%     -    1s
     0     0 55261.6995    0    9 57393.0000 55261.6995  3.71%     -    1s
     0     0 55620.1555    0    7 57393.0000 55620.1555  3.09%     -    2s
H    0     0                    57158.000000 55620.1555  2.69%     -    2s
     0     0 55621.0327    0    3 57158.0000 55621.0327  2.69%     -    2s
H    0     0                    56478.815745 55621.0327  1.52%     -    2s
H    0     0                    56289.000000 55621.0327  1.19%     -    2s
     0     2 55624.4667    0    3 56289.0000 55624.4667  1.18%     -    2s
H    3     3                    55822.333333 55699.1111  0.22%  70.3    2s
H    4     3                    55775.000000 55700.7273  0.13%  59.5    2s
H    8     4                    55743.800000 55703.7273  0.07%  40.0    3s
*    9     2               8    55721.000000 55703.7273  0.03%  38.0    3s

Cutting planes:
  Implied bound: 40

Explored 11 nodes (5772 simplex iterations) in 3.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.572100000000e+04, best bound 5.571756250000e+04, gap 0.0062%