Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:23 2012 Optimize a model with 89 rows, 57 columns and 277 nonzeros Presolve time: 0.00s Presolved: 89 rows, 57 columns, 277 nonzeros Variable types: 0 continuous, 57 integer (57 binary) Found heuristic solution: objective 19.0000000 Root relaxation: objective 0.000000e+00, 21 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 13 19.00000 0.00000 100% - 0s 0 0 0.77976 0 21 19.00000 0.77976 95.9% - 0s 0 0 0.79487 0 15 19.00000 0.79487 95.8% - 0s 0 0 0.79487 0 15 19.00000 0.79487 95.8% - 0s 0 0 0.79487 0 15 19.00000 0.79487 95.8% - 0s 0 0 0.79487 0 15 19.00000 0.79487 95.8% - 0s H 0 0 18.0000000 0.79487 95.6% - 0s 0 2 1.04167 0 15 18.00000 1.04167 94.2% - 0s Cutting planes: Gomory: 1 Mod-K: 4 Explored 94 nodes (908 simplex iterations) in 0.02 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%