Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:28 2013

Optimize a model with 528 rows, 23088 columns and 46128 nonzeros
Presolve time: 0.03s
Presolved: 528 rows, 23088 columns, 46128 nonzeros
Variable types: 23040 continuous, 48 integer (48 binary)

Root relaxation: objective 5.585639e+04, 1204 iterations, 0.03 seconds

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

     0     0 55856.3939    0    5          - 55856.3939     -      -    0s
H    0     0                    57341.000000 55856.3939  2.59%     -    0s
H    0     0                    56152.000000 55856.3939  0.53%     -    0s
     0     0 56149.6915    0    2 56152.0000 56149.6915  0.00%     -    0s

Cutting planes:
  Implied bound: 43

Explored 0 nodes (1366 simplex iterations) in 0.15 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.615200000000e+04, best bound 5.614969153069e+04, gap 0.0041%