Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:41 2012 Optimize a model with 177 rows, 62 columns and 354 nonzeros Presolve removed 54 rows and 4 columns Presolve time: 0.00s Presolved: 123 rows, 58 columns, 277 nonzeros Variable types: 0 continuous, 58 integer (58 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.500000e+01, 76 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 25.00000 0 42 20.00000 25.00000 25.0% - 0s H 0 0 23.0000000 25.00000 8.70% - 0s 0 0 24.76190 0 55 23.00000 24.76190 7.66% - 0s H 0 0 24.0000000 24.76190 3.17% - 0s Cutting planes: Gomory: 1 Zero half: 3 Explored 0 nodes (164 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%