Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012 Optimize a model with 173 rows, 61 columns and 346 nonzeros Presolve removed 46 rows and 3 columns Presolve time: 0.00s Presolved: 127 rows, 58 columns, 279 nonzeros Variable types: 0 continuous, 58 integer (58 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.500000e+01, 80 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 48 20.00000 25.00000 25.0% - 0s H 0 0 22.0000000 25.00000 13.6% - 0s 0 0 24.54545 0 53 22.00000 24.54545 11.6% - 0s H 0 0 23.0000000 24.54545 6.72% - 0s H 0 0 24.0000000 24.54545 2.27% - 0s Cutting planes: Gomory: 2 Zero half: 6 Explored 0 nodes (174 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%