Gurobi 5.0.1 (linux64) logging started Wed Nov 28 10:36:25 2012

Optimize a model with 4354 rows, 4225 columns and 25088 nonzeros
Presolve removed 64 rows and 1 columns
Presolve time: 0.14s
Presolved: 4290 rows, 4224 columns, 24832 nonzeros
Variable types: 64 continuous, 4160 integer (4160 binary)
Found heuristic solution: objective 9749.0000000
Found heuristic solution: objective 9396.0000000

Root relaxation: objective 1.761000e+03, 369 iterations, 0.02 seconds

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

     0     0 1761.00000    0   24 9396.00000 1761.00000  81.3%     -    0s
H    0     0                    1890.0000000 1761.00000  6.83%     -    0s
     0     0 1764.85709    0   35 1890.00000 1764.85709  6.62%     -    0s
     0     0 1764.85709    0   27 1890.00000 1764.85709  6.62%     -    0s
     0     0 1765.06154    0   53 1890.00000 1765.06154  6.61%     -    0s
     0     0 1765.06154    0   54 1890.00000 1765.06154  6.61%     -    0s
     0     0 1765.06154    0   33 1890.00000 1765.06154  6.61%     -    0s
H    0     0                    1878.0000000 1765.06154  6.01%     -    0s
     0     0 1765.06154    0   31 1878.00000 1765.06154  6.01%     -    1s
H    0     0                    1859.0000000 1765.06154  5.05%     -    1s
H    0     0                    1839.0000000 1765.06154  4.02%     -    1s
     0     2 1765.20571    0   31 1839.00000 1765.20571  4.01%     -    1s
  1020   109 1823.84562   24   42 1839.00000 1823.84562  0.82%  16.4    5s

Cutting planes:
  Gomory: 1
  Zero half: 1

Explored 3142 nodes (50591 simplex iterations) in 8.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.839000000000e+03, best bound 1.839000000000e+03, gap 0.0%