Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:42 2012 Optimize a model with 242 rows, 66 columns and 484 nonzeros Presolve removed 71 rows and 0 columns Presolve time: 0.00s Presolved: 171 rows, 66 columns, 395 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 2.600000e+01, 112 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 26.00000 0 52 21.00000 26.00000 23.8% - 0s H 0 0 22.0000000 26.00000 18.2% - 0s 0 0 25.43750 0 64 22.00000 25.43750 15.6% - 0s H 0 0 24.0000000 25.43750 5.99% - 0s 0 0 25.11111 0 62 24.00000 25.11111 4.63% - 0s 0 0 cutoff 0 24.00000 24.99997 4.17% - 0s Cutting planes: Gomory: 1 Zero half: 56 Explored 0 nodes (204 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%