Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:00:17 2013 Optimize a model with 1800 rows, 27150 columns and 57250 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.21s Presolved: 1750 rows, 27100 columns, 56200 nonzeros Variable types: 26100 continuous, 1000 integer (1000 binary) Root relaxation: objective 2.198499e+05, 2727 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 4 - 219849.939 - - 0s H 0 0 230631.46806 219849.939 4.67% - 0s 0 0 219876.353 0 2 230631.468 219876.353 4.66% - 0s 0 0 219881.295 0 2 230631.468 219881.295 4.66% - 0s 0 0 219883.646 0 4 230631.468 219883.646 4.66% - 0s 0 0 219883.957 0 2 230631.468 219883.957 4.66% - 0s 0 0 219886.876 0 2 230631.468 219886.876 4.66% - 1s 0 0 219887.117 0 2 230631.468 219887.117 4.66% - 1s 0 0 219887.117 0 2 230631.468 219887.117 4.66% - 1s 0 0 219887.117 0 2 230631.468 219887.117 4.66% - 1s 0 2 219887.117 0 2 230631.468 219887.117 4.66% - 1s H 27 27 223821.44013 220954.133 1.28% 82.1 2s H 54 34 223614.65726 220954.133 1.19% 53.0 3s H 108 34 222979.22374 220954.133 0.91% 34.4 4s 125 34 221958.434 10 2 222979.224 221014.973 0.88% 33.9 5s H 135 30 222820.11761 221014.973 0.81% 31.9 5s * 139 14 20 221990.08222 221014.973 0.44% 31.2 5s * 164 6 17 221986.52168 221926.802 0.03% 33.1 5s Cutting planes: Implied bound: 29 Flow cover: 5 Explored 173 nodes (8751 simplex iterations) in 5.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.219865216793e+05, best bound 2.219865216793e+05, gap 0.0%