Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:16:25 2013

Optimize a model with 28726 rows, 28196 columns and 112466 nonzeros
Presolve removed 53 rows and 0 columns
Presolve time: 0.12s
Presolved: 28673 rows, 28196 columns, 112413 nonzeros
Variable types: 28143 continuous, 53 integer (53 binary)

Root relaxation: objective 5.046860e+04, 5157 iterations, 2.47 seconds

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

     0     0 50468.6022    0   46          - 50468.6022     -      -    2s
H    0     0                    74426.000000 50468.6022  32.2%     -    4s
     0     0 66072.0830    0    9 74426.0000 66072.0830  11.2%     -    6s
H    0     0                    71181.016677 66072.0830  7.18%     -    6s
H    0     0                    67886.000000 66072.0830  2.67%     -    6s
     0     0 66714.9702    0    5 67886.0000 66714.9702  1.72%     -    6s
H    0     0                    66757.000000 66714.9702  0.06%     -    6s
     0     0 66728.8182    0    1 66757.0000 66728.8182  0.04%     -    7s
H    0     0                    66748.000000 66728.8182  0.03%     -    7s

Cutting planes:
  Implied bound: 49

Explored 0 nodes (9199 simplex iterations) in 7.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.674800000000e+04, best bound 6.674800000000e+04, gap 0.0%