Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:17 2013

Optimize a model with 228 rows, 644 columns and 1682 nonzeros
Presolve removed 210 rows and 586 columns
Presolve time: 0.01s
Presolved: 18 rows, 58 columns, 116 nonzeros
Variable types: 46 continuous, 12 integer (12 binary)

Root relaxation: objective 4.810927e+03, 5 iterations, 0.00 seconds

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

     0     0 4810.92679    0    2          - 4810.92679     -      -    0s
     0     0 4830.96479    0    4          - 4830.96479     -      -    0s
H    0     0                    4831.8812825 4830.96479  0.02%     -    0s
     0     0 4830.96538    0    4 4831.88128 4830.96538  0.02%     -    0s
     0     0 4831.00545    0    4 4831.88128 4831.00545  0.02%     -    0s
     0     0 4831.04616    0    4 4831.88128 4831.04616  0.02%     -    0s
     0     0 4831.08693    0    4 4831.88128 4831.08693  0.02%     -    0s
H    0     0                    4831.1180431 4831.08693  0.00%     -    0s

Cutting planes:
  Cover: 2
  Implied bound: 2
  Flow cover: 1

Explored 0 nodes (30 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831118043090e+03, best bound 4.831086932439e+03, gap 0.0006%