Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:37 2012 Optimize a model with 103 rows, 43 columns and 206 nonzeros Presolve removed 29 rows and 3 columns Presolve time: 0.00s Presolved: 74 rows, 40 columns, 163 nonzeros Variable types: 0 continuous, 40 integer (40 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 1.966667e+01, 51 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19.66667 0 36 17.00000 19.66667 15.7% - 0s H 0 0 18.0000000 19.66667 9.26% - 0s 0 0 cutoff 0 18.00000 18.99998 5.56% - 0s Cutting planes: Gomory: 1 Zero half: 29 Explored 0 nodes (69 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%