Gurobi 5.0.1 (linux64) logging started Wed Nov 28 03:52:02 2012 Optimize a model with 1191 rows, 2244 columns and 6633 nonzeros Presolve removed 33 rows and 33 columns Presolve time: 0.04s Presolved: 1158 rows, 2211 columns, 6567 nonzeros Variable types: 1089 continuous, 1122 integer (1122 binary) Found heuristic solution: objective 5733.0000000 Found heuristic solution: objective 2523.0000000 Found heuristic solution: objective 2227.0000000 Root relaxation: objective 1.195845e+03, 1838 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1195.84535 0 43 2227.00000 1195.84535 46.3% - 0s H 0 0 1636.0000000 1195.84535 26.9% - 0s 0 0 1210.80563 0 66 1636.00000 1210.80563 26.0% - 0s 0 0 1215.01016 0 70 1636.00000 1215.01016 25.7% - 0s 0 0 1258.67273 0 38 1636.00000 1258.67273 23.1% - 0s 0 0 1281.37500 0 20 1636.00000 1281.37500 21.7% - 0s 0 0 1282.16959 0 53 1636.00000 1282.16959 21.6% - 0s 0 0 1282.19516 0 53 1636.00000 1282.19516 21.6% - 0s 0 0 1282.20162 0 53 1636.00000 1282.20162 21.6% - 0s H 0 0 1427.0000000 1282.20162 10.1% - 0s H 0 0 1330.0000000 1282.20162 3.59% - 0s 0 0 1282.20162 0 33 1330.00000 1282.20162 3.59% - 0s 0 0 1282.20162 0 25 1330.00000 1282.20162 3.59% - 0s 0 0 1282.20162 0 45 1330.00000 1282.20162 3.59% - 0s 0 0 1282.20162 0 43 1330.00000 1282.20162 3.59% - 0s 0 0 1282.27650 0 48 1330.00000 1282.27650 3.59% - 0s 0 0 1282.31169 0 44 1330.00000 1282.31169 3.59% - 0s 0 0 1282.31169 0 43 1330.00000 1282.31169 3.59% - 0s 0 0 1282.31169 0 43 1330.00000 1282.31169 3.59% - 0s 0 2 1282.58853 0 43 1330.00000 1282.58853 3.56% - 0s * 9 4 6 1286.0000000 1286.00000 0.0% 64.6 0s Cutting planes: Implied bound: 6 Flow cover: 32 Flow path: 1 Explored 10 nodes (5503 simplex iterations) in 0.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.286000000000e+03, best bound 1.286000000000e+03, gap 0.0%