Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:36 2012 Optimize a model with 65 rows, 32 columns and 130 nonzeros Presolve removed 11 rows and 1 columns Presolve time: 0.00s Presolved: 54 rows, 31 columns, 116 nonzeros Variable types: 0 continuous, 31 integer (31 binary) Found heuristic solution: objective 13.0000000 Root relaxation: objective 1.500000e+01, 34 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.00000 0 28 13.00000 15.00000 15.4% - 0s 0 0 14.50000 0 23 13.00000 14.50000 11.5% - 0s 0 0 cutoff 0 13.00000 13.99999 7.69% - 0s Cutting planes: Gomory: 1 Zero half: 7 Explored 0 nodes (73 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%