Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:32:28 2013 Optimize a model with 792 rows, 51912 columns and 103752 nonzeros Presolve time: 0.08s Presolved: 792 rows, 51912 columns, 103752 nonzeros Variable types: 51840 continuous, 72 integer (72 binary) Root relaxation: objective 9.070747e+04, 2328 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 90707.4687 0 6 - 90707.4687 - - 0s H 0 0 94214.000000 90707.4687 3.72% - 0s 0 0 90826.6086 0 4 94214.0000 90826.6086 3.60% - 0s 0 0 90866.5226 0 6 94214.0000 90866.5226 3.55% - 0s 0 0 90867.9170 0 4 94214.0000 90867.9170 3.55% - 0s H 0 0 94011.000000 90867.9170 3.34% - 0s 0 0 90872.3284 0 5 94011.0000 90872.3284 3.34% - 0s H 0 0 93946.000000 90872.3284 3.27% - 0s 0 0 90875.0529 0 4 93946.0000 90875.0529 3.27% - 0s H 0 0 93215.548610 90875.0529 2.51% - 0s H 0 0 92357.000000 90875.0529 1.60% - 0s 0 0 90875.0529 0 4 92357.0000 90875.0529 1.60% - 0s 0 0 90875.0529 0 4 92357.0000 90875.0529 1.60% - 0s H 0 0 91474.000000 90875.0529 0.65% - 1s 0 0 90875.0529 0 6 91474.0000 90875.0529 0.65% - 1s 0 0 90875.0529 0 4 91474.0000 90875.0529 0.65% - 1s 0 0 90875.0529 0 6 91474.0000 90875.0529 0.65% - 1s 0 0 90875.0529 0 4 91474.0000 90875.0529 0.65% - 1s 0 0 90875.0529 0 5 91474.0000 90875.0529 0.65% - 1s 0 0 90875.0529 0 4 91474.0000 90875.0529 0.65% - 1s 0 0 90875.0529 0 4 91474.0000 90875.0529 0.65% - 1s 0 2 90885.8571 0 4 91474.0000 90885.8571 0.64% - 2s H 11 8 91244.000000 90976.5051 0.29% 48.2 2s H 12 8 91223.000000 90976.5051 0.27% 45.4 2s H 13 7 91135.000000 90976.5051 0.17% 45.1 2s * 18 3 13 91092.000000 90976.5051 0.13% 40.2 2s Cutting planes: Implied bound: 60 Flow cover: 4 Explored 22 nodes (4991 simplex iterations) in 2.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.109200000000e+04, best bound 9.109200000000e+04, gap 0.0%