Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:48 2012 Optimize a model with 338 rows, 78 columns and 676 nonzeros Presolve removed 125 rows and 0 columns Presolve time: 0.00s Presolved: 213 rows, 78 columns, 520 nonzeros Variable types: 0 continuous, 78 integer (78 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.850000e+01, 138 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28.50000 0 49 22.00000 28.50000 29.5% - 0s H 0 0 24.0000000 28.50000 18.8% - 0s 0 0 28.00000 0 71 24.00000 28.00000 16.7% - 0s H 0 0 25.0000000 28.00000 12.0% - 0s H 0 0 26.0000000 28.00000 7.69% - 0s 0 0 28.00000 0 74 26.00000 28.00000 7.69% - 0s 0 0 28.00000 0 75 26.00000 28.00000 7.69% - 0s 0 0 28.00000 0 75 26.00000 28.00000 7.69% - 0s 0 2 28.00000 0 75 26.00000 28.00000 7.69% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 15 Explored 9 nodes (910 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%