Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:06 2013

Optimize a model with 36660 rows, 36060 columns and 144060 nonzeros
Presolve removed 3445 rows and 0 columns
Presolve time: 0.22s
Presolved: 33215 rows, 36060 columns, 137170 nonzeros
Variable types: 36000 continuous, 60 integer (60 binary)

Root relaxation: objective 5.973872e+04, 6251 iterations, 0.81 seconds

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

     0     0 59738.7160    0    1          - 59738.7160     -      -    1s
H    0     0                    60516.000000 59738.7160  1.28%     -    1s
H    0     0                    60359.000000 59738.7160  1.03%     -    1s
H    0     0                    60031.000000 59738.7160  0.49%     -    1s
     0     0 59740.5341    0    3 60031.0000 59740.5341  0.48%     -    1s
H    0     0                    59999.000000 59740.5341  0.43%     -    1s
     0     0 59964.8239    0    2 59999.0000 59964.8239  0.06%     -    1s
     0     0 59996.1084    0    1 59999.0000 59996.1084  0.00%     -    2s

Explored 0 nodes (6686 simplex iterations) in 2.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.999900000000e+04, best bound 5.999610843373e+04, gap 0.0048%