Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:18:57 2013

Optimize a model with 29808 rows, 29268 columns and 116748 nonzeros
Presolve removed 54 rows and 0 columns
Presolve time: 0.13s
Presolved: 29754 rows, 29268 columns, 116694 nonzeros
Variable types: 29214 continuous, 54 integer (54 binary)

Root relaxation: objective 5.151632e+04, 4230 iterations, 1.83 seconds

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

     0     0 51516.3235    0   42          - 51516.3235     -      -    2s
H    0     0                    67385.000000 51516.3235  23.5%     -    2s
     0     0 61499.0192    0    7 67385.0000 61499.0192  8.73%     -    4s
H    0     0                    64986.393746 61499.0192  5.37%     -    4s
H    0     0                    63270.000000 61499.0192  2.80%     -    4s
H    0     0                    61643.000000 61499.0192  0.23%     -    4s
     0     0 61544.1793    0    5 61643.0000 61544.1793  0.16%     -    4s
     0     0 61551.1583    0    4 61643.0000 61551.1583  0.15%     -    5s
     0     0 61624.9737    0    3 61643.0000 61624.9737  0.03%     -    5s
     0     0 61625.0448    0    3 61643.0000 61625.0448  0.03%     -    5s
     0     0 61625.3052    0    2 61643.0000 61625.3052  0.03%     -    5s
     0     2 61626.0909    0    2 61643.0000 61626.0909  0.03%     -    6s

Cutting planes:
  Implied bound: 44

Explored 6 nodes (7547 simplex iterations) in 6.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.164300000000e+04, best bound 6.164300000000e+04, gap 0.0%