Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:48:35 2012 Optimize a model with 658 rows, 164 columns and 1316 nonzeros Presolve removed 140 rows and 1 columns Presolve time: 0.00s Presolved: 518 rows, 163 columns, 1125 nonzeros Variable types: 0 continuous, 163 integer (163 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.750000e+01, 280 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.50000 0 127 49.00000 67.50000 37.8% - 0s 0 0 66.33333 0 129 49.00000 66.33333 35.4% - 0s 0 0 66.11511 0 159 49.00000 66.11511 34.9% - 0s H 0 0 53.0000000 66.11511 24.7% - 0s 0 0 65.45865 0 161 53.00000 65.45865 23.5% - 0s 0 0 64.41694 0 161 53.00000 64.41694 21.5% - 0s 0 0 64.04483 0 162 53.00000 64.04483 20.8% - 0s 0 0 63.73630 0 159 53.00000 63.73630 20.3% - 0s 0 0 63.66142 0 162 53.00000 63.66142 20.1% - 0s 0 0 63.38376 0 162 53.00000 63.38376 19.6% - 0s 0 0 63.31583 0 161 53.00000 63.31583 19.5% - 0s 0 0 63.29089 0 161 53.00000 63.29089 19.4% - 0s 0 0 63.29089 0 161 53.00000 63.29089 19.4% - 0s H 0 0 54.0000000 63.29089 17.2% - 0s H 0 0 56.0000000 63.29089 13.0% - 0s 0 2 63.28846 0 160 56.00000 63.28846 13.0% - 0s * 565 140 16 57.0000000 60.35849 5.89% 39.6 1s 713 158 59.61905 8 160 57.00000 60.00000 5.26% 37.8 5s Cutting planes: Gomory: 5 Zero half: 70 Explored 1919 nodes (66236 simplex iterations) in 7.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%