Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:47:29 2012 Optimize a model with 682 rows, 163 columns and 1364 nonzeros Presolve removed 142 rows and 0 columns Presolve time: 0.00s Presolved: 540 rows, 163 columns, 1174 nonzeros Variable types: 0 continuous, 163 integer (163 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.650000e+01, 299 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.50000 0 125 45.00000 66.50000 47.8% - 0s 0 0 64.38636 0 158 45.00000 64.38636 43.1% - 0s H 0 0 48.0000000 64.38636 34.1% - 0s H 0 0 49.0000000 64.38636 31.4% - 0s 0 0 63.34544 0 160 49.00000 63.34544 29.3% - 0s 0 0 63.02660 0 157 49.00000 63.02660 28.6% - 0s 0 0 62.55907 0 161 49.00000 62.55907 27.7% - 0s H 0 0 50.0000000 62.55907 25.1% - 0s 0 0 62.21857 0 163 50.00000 62.21857 24.4% - 0s 0 0 61.90296 0 162 50.00000 61.90296 23.8% - 0s 0 0 61.74101 0 162 50.00000 61.74101 23.5% - 0s 0 0 61.53646 0 161 50.00000 61.53646 23.1% - 0s 0 0 61.38473 0 161 50.00000 61.38473 22.8% - 0s 0 0 61.30062 0 162 50.00000 61.30062 22.6% - 0s 0 0 61.22915 0 163 50.00000 61.22915 22.5% - 0s 0 0 61.18471 0 161 50.00000 61.18471 22.4% - 0s 0 0 61.17151 0 163 50.00000 61.17151 22.3% - 0s 0 0 61.17151 0 163 50.00000 61.17151 22.3% - 0s 0 2 61.17149 0 163 50.00000 61.17149 22.3% - 0s H 108 57 51.0000000 60.21155 18.1% 49.9 0s H 518 211 52.0000000 59.02403 13.5% 39.2 0s 622 260 53.50000 13 162 52.00000 58.75655 13.0% 38.2 5s 954 382 57.42980 21 142 52.00000 58.75655 13.0% 48.1 10s * 2140 596 31 53.0000000 56.96610 7.48% 42.5 12s 3079 669 55.77720 23 123 53.00000 56.04301 5.74% 41.1 15s Cutting planes: Gomory: 3 Zero half: 230 Explored 5136 nodes (187978 simplex iterations) in 18.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%