Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:36 2012 Optimize a model with 70 rows, 36 columns and 140 nonzeros Presolve removed 40 rows and 12 columns Presolve time: 0.00s Presolved: 30 rows, 24 columns, 63 nonzeros Variable types: 0 continuous, 24 integer (24 binary) Found heuristic solution: objective 18.0000000 Root relaxation: cutoff, 21 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 18.00000 18.99998 5.56% - 0s Explored 0 nodes (21 simplex iterations) in 0.00 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%