Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012 Optimize a model with 198 rows, 59 columns and 396 nonzeros Presolve removed 62 rows and 1 columns Presolve time: 0.00s Presolved: 136 rows, 58 columns, 310 nonzeros Variable types: 0 continuous, 58 integer (58 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.362500e+01, 85 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 23.62500 0 52 20.00000 23.62500 18.1% - 0s H 0 0 21.0000000 23.62500 12.5% - 0s H 0 0 22.0000000 23.62500 7.39% - 0s 0 0 cutoff 0 22.00000 22.99998 4.55% - 0s Cutting planes: Gomory: 2 Zero half: 33 Explored 0 nodes (139 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%