Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:36 2013

Optimize a model with 27664 rows, 27144 columns and 108264 nonzeros
Presolve removed 52 rows and 0 columns
Presolve time: 0.12s
Presolved: 27612 rows, 27144 columns, 108212 nonzeros
Variable types: 27092 continuous, 52 integer (52 binary)

Root relaxation: objective 4.850366e+04, 3675 iterations, 1.07 seconds

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

     0     0 48503.6560    0   44          - 48503.6560     -      -    1s
H    0     0                    66519.000000 48503.6560  27.1%     -    2s
     0     0 56983.4143    0   10 66519.0000 56983.4143  14.3%     -    4s
H    0     0                    65700.364827 56983.4143  13.3%     -    4s
H    0     0                    62663.000000 56983.4143  9.06%     -    4s
     0     0 57559.9154    0    3 62663.0000 57559.9154  8.14%     -    4s
H    0     0                    59287.640998 57559.9154  2.91%     -    4s
H    0     0                    58883.000000 57559.9154  2.25%     -    4s
H    0     0                    58769.000000 57559.9154  2.06%     -    4s
     0     2 57560.8198    0    3 58769.0000 57560.8198  2.06%     -    5s
H    1     1                    58413.173325 57560.8198  1.46%   0.0    5s
H    3     3                    58279.347826 57684.8696  1.02%  83.3    5s
H    4     4                    57875.642857 57684.8696  0.33%  66.0    5s
H   14     5                    57854.250000 57802.2500  0.09%   113    5s
*   15     4               5    57812.000000 57802.2500  0.02%   106    5s

Cutting planes:
  Implied bound: 49

Explored 18 nodes (8339 simplex iterations) in 5.88 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.781200000000e+04, best bound 5.781200000000e+04, gap 0.0%