Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:15:26 2012 Optimize a model with 345 rows, 258 columns and 1118 nonzeros Presolve time: 0.00s Presolved: 345 rows, 258 columns, 1118 nonzeros Variable types: 0 continuous, 258 integer (258 binary) Found heuristic solution: objective 72.0000000 Root relaxation: objective 0.000000e+00, 139 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 86 72.00000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s 0 0 0.48276 0 91 62.00000 0.48276 99.2% - 0s H 0 0 55.0000000 0.48276 99.1% - 0s 0 0 0.65443 0 89 55.00000 0.65443 98.8% - 0s H 0 0 54.0000000 0.65443 98.8% - 0s 0 0 0.65443 0 89 54.00000 0.65443 98.8% - 0s 0 0 0.65443 0 89 54.00000 0.65443 98.8% - 0s H 0 0 51.0000000 0.65443 98.7% - 0s H 0 0 48.0000000 0.65443 98.6% - 0s 0 2 0.65443 0 89 48.00000 0.65443 98.6% - 0s * 38 36 25 39.0000000 3.49469 91.0% 27.6 0s * 102 71 21 36.0000000 7.01644 80.5% 26.3 0s * 186 123 21 35.0000000 11.15469 68.1% 24.0 0s * 238 130 14 34.0000000 11.21707 67.0% 23.0 0s * 461 173 17 32.0000000 15.57143 51.3% 21.2 0s * 631 208 27 31.0000000 17.38596 43.9% 22.2 0s Cutting planes: Gomory: 1 Zero half: 3 Explored 2966 nodes (62530 simplex iterations) in 2.91 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%