Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:48 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 4.467287e+04, 3599 iterations, 1.28 seconds

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

     0     0 44672.8747    0   40          - 44672.8747     -      -    1s
H    0     0                    58705.000000 44672.8747  23.9%     -    1s
     0     0 53266.2534    0    4 58705.0000 53266.2534  9.26%     -    3s
H    0     0                    56103.971985 53266.2534  5.06%     -    3s
H    0     0                    55076.000000 53266.2534  3.29%     -    3s
H    0     0                    53859.000000 53266.2534  1.10%     -    3s
     0     0 53412.1816    0    5 53859.0000 53412.1816  0.83%     -    3s
H    0     0                    53580.000000 53412.1816  0.31%     -    3s
     0     0 53412.5054    0    4 53580.0000 53412.5054  0.31%     -    3s
     0     0 53463.3152    0    3 53580.0000 53463.3152  0.22%     -    3s
H    0     0                    53519.000000 53463.3152  0.10%     -    3s
     0     2 53465.5802    0    2 53519.0000 53465.5802  0.10%     -    4s

Cutting planes:
  Implied bound: 40

Explored 4 nodes (6055 simplex iterations) in 4.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.351900000000e+04, best bound 5.351608571429e+04, gap 0.0054%