Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012 Optimize a model with 199 rows, 61 columns and 398 nonzeros Presolve removed 68 rows and 2 columns Presolve time: 0.00s Presolved: 131 rows, 59 columns, 309 nonzeros Variable types: 0 continuous, 59 integer (59 binary) Found heuristic solution: objective 23.0000000 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 34 23.00000 25.00000 8.70% - 0s 0 0 24.75000 0 48 23.00000 24.75000 7.61% - 0s 0 0 24.00000 0 24 23.00000 24.00000 4.35% - 0s Cutting planes: Zero half: 15 Explored 0 nodes (150 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%