Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:24:00 2013 Optimize a model with 32032 rows, 31472 columns and 125552 nonzeros Presolve removed 56 rows and 0 columns Presolve time: 0.14s Presolved: 31976 rows, 31472 columns, 125496 nonzeros Variable types: 31416 continuous, 56 integer (56 binary) Root relaxation: objective 5.057265e+04, 4718 iterations, 2.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50572.6517 0 47 - 50572.6517 - - 2s H 0 0 75503.000000 50572.6517 33.0% - 3s 0 0 60851.7952 0 10 75503.0000 60851.7952 19.4% - 6s H 0 0 71101.148196 60851.7952 14.4% - 6s H 0 0 68239.000000 60851.7952 10.8% - 6s 0 0 61175.4065 0 6 68239.0000 61175.4065 10.4% - 6s H 0 0 65531.346143 61175.4065 6.65% - 6s H 0 0 65032.000000 61175.4065 5.93% - 6s H 0 0 61309.000000 61175.4065 0.22% - 6s 0 0 61178.5559 0 3 61309.0000 61178.5559 0.21% - 7s 0 0 61186.4063 0 3 61309.0000 61186.4063 0.20% - 7s 0 2 61190.5190 0 3 61309.0000 61190.5190 0.19% - 7s Cutting planes: Implied bound: 53 Explored 8 nodes (9255 simplex iterations) in 8.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.130900000000e+04, best bound 6.130900000000e+04, gap 0.0%