Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:41:49 2012 Optimize a model with 353 rows, 256 columns and 1136 nonzeros Presolve time: 0.00s Presolved: 353 rows, 256 columns, 1136 nonzeros Variable types: 0 continuous, 256 integer (256 binary) Found heuristic solution: objective 89.0000000 Root relaxation: objective 0.000000e+00, 104 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 80 89.00000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.57143 0 81 72.00000 0.57143 99.2% - 0s 0 0 1.13304 0 84 72.00000 1.13304 98.4% - 0s H 0 0 69.0000000 1.13304 98.4% - 0s 0 0 1.20819 0 87 69.00000 1.20819 98.2% - 0s H 0 0 65.0000000 1.20819 98.1% - 0s 0 0 1.21867 0 86 65.00000 1.21867 98.1% - 0s H 0 0 61.0000000 1.21867 98.0% - 0s 0 0 1.22978 0 87 61.00000 1.22978 98.0% - 0s H 0 0 58.0000000 1.22978 97.9% - 0s H 0 0 55.0000000 1.22978 97.8% - 0s H 0 0 49.0000000 1.22978 97.5% - 0s H 0 0 42.0000000 1.22978 97.1% - 0s 0 2 1.27288 0 87 42.00000 1.27288 97.0% - 0s * 37 35 23 38.0000000 4.46819 88.2% 30.1 0s * 172 111 21 35.0000000 10.35143 70.4% 27.5 0s * 404 161 17 32.0000000 15.21795 52.4% 25.0 0s H 576 167 31.0000000 17.02418 45.1% 24.6 0s Cutting planes: Gomory: 3 Mod-K: 4 Explored 1829 nodes (40618 simplex iterations) in 1.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%