Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:53 2012 Optimize a model with 361 rows, 85 columns and 722 nonzeros Presolve removed 114 rows and 0 columns Presolve time: 0.00s Presolved: 247 rows, 85 columns, 584 nonzeros Variable types: 0 continuous, 85 integer (85 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.155556e+01, 158 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 31.55556 0 80 26.00000 31.55556 21.4% - 0s 0 0 30.74603 0 79 26.00000 30.74603 18.3% - 0s 0 0 30.57143 0 82 26.00000 30.57143 17.6% - 0s 0 0 30.38824 0 80 26.00000 30.38824 16.9% - 0s 0 0 30.12821 0 81 26.00000 30.12821 15.9% - 0s H 0 0 27.0000000 30.12821 11.6% - 0s 0 0 30.09302 0 81 27.00000 30.09302 11.5% - 0s 0 0 30.08382 0 84 27.00000 30.08382 11.4% - 0s 0 0 30.08382 0 83 27.00000 30.08382 11.4% - 0s 0 2 30.08382 0 83 27.00000 30.08382 11.4% - 0s * 86 2 6 28.0000000 28.45455 1.62% 20.6 0s Cutting planes: Gomory: 1 Zero half: 43 Explored 87 nodes (2271 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%