Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:02 2012 Optimize a model with 53 rows, 50 columns and 180 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 53 rows, 48 columns, 178 nonzeros Variable types: 0 continuous, 48 integer (47 binary) Found heuristic solution: objective 9.0000000 Root relaxation: objective 0.000000e+00, 32 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 21 9.00000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 0 0.48214 0 22 4.00000 0.48214 87.9% - 0s 0 0 1.04020 0 26 4.00000 1.04020 74.0% - 0s 0 0 1.04020 0 27 4.00000 1.04020 74.0% - 0s 0 0 1.04020 0 25 4.00000 1.04020 74.0% - 0s 0 2 1.04020 0 25 4.00000 1.04020 74.0% - 0s Cutting planes: Gomory: 3 Explored 9 nodes (244 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%