Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:10:58 2013

Optimize a model with 47056 rows, 46376 columns and 185096 nonzeros
Presolve removed 68 rows and 0 columns
Presolve time: 0.21s
Presolved: 46988 rows, 46376 columns, 185028 nonzeros
Variable types: 46308 continuous, 68 integer (68 binary)

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    6773    6.2623438e+04   9.978303e+02   0.000000e+00      5s
    7030    6.2647235e+04   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 6.264724e+04, 7030 iterations, 5.61 seconds

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

     0     0 62647.2351    0   57          - 62647.2351     -      -    6s
H    0     0                    107791.00000 62647.2351  41.9%     -    9s
     0     0 85381.0659    0   15 107791.000 85381.0659  20.8%     -   18s
H    0     0                    104269.16534 85381.0659  18.1%     -   18s
H    0     0                    91023.000000 85381.0659  6.20%     -   19s
     0     0 89322.4865    0    6 91023.0000 89322.4865  1.87%     -   20s
H    0     0                    89545.000000 89322.4865  0.25%     -   20s
     0     0 89324.8585    0    5 89545.0000 89324.8585  0.25%     -   20s
     0     0 89349.9794    0    4 89545.0000 89349.9794  0.22%     -   21s
     0     2 89350.0812    0    4 89545.0000 89350.0812  0.22%     -   23s
*   12     1               4    89497.000000 89492.1538  0.01%   239   24s

Cutting planes:
  Implied bound: 64

Explored 13 nodes (18758 simplex iterations) in 24.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.949700000000e+04, best bound 8.949215384615e+04, gap 0.0054%