Gurobi 5.0.1 (linux64) logging started Sat Dec 8 03:30:32 2012 Optimize a model with 555 rows, 540 columns and 1776 nonzeros Presolve removed 54 rows and 32 columns Presolve time: 0.01s Presolved: 501 rows, 508 columns, 1648 nonzeros Variable types: 338 continuous, 170 integer (170 binary) Root relaxation: objective 4.635635e+04, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46356.3453 0 74 - 46356.3453 - - 0s H 0 0 74569.000000 46356.3453 37.8% - 0s 0 0 56619.0449 0 20 74569.0000 56619.0449 24.1% - 0s H 0 0 68418.196105 56619.0449 17.2% - 0s 0 0 57336.8325 0 17 68418.1961 57336.8325 16.2% - 0s 0 0 57675.0911 0 4 68418.1961 57675.0911 15.7% - 0s 0 0 57678.5544 0 5 68418.1961 57678.5544 15.7% - 0s H 0 0 58979.000000 57678.5544 2.20% - 0s 0 2 57679.7273 0 5 58979.0000 57679.7273 2.20% - 0s H 1 1 57907.000000 57679.7273 0.39% 0.0 0s H 27 11 57881.000000 57728.0969 0.26% 3.5 0s * 40 5 5 57832.000000 57814.4989 0.03% 3.1 0s Cutting planes: Gomory: 16 Cover: 1 Implied bound: 1 Flow cover: 45 Flow path: 32 Explored 47 nodes (517 simplex iterations) in 0.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.783200000000e+04, best bound 5.783200000000e+04, gap 0.0%