Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:37:47 2012 Optimize a model with 47 rows, 43 columns and 158 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 47 rows, 42 columns, 157 nonzeros Variable types: 0 continuous, 42 integer (41 binary) Found heuristic solution: objective 9.0000000 Found heuristic solution: objective 8.0000000 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 18 8.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 0 0.40000 0 20 4.00000 0.40000 90.0% - 0s 0 0 0.95167 0 22 4.00000 0.95167 76.2% - 0s 0 0 0.96253 0 23 4.00000 0.96253 75.9% - 0s 0 0 0.96253 0 23 4.00000 0.96253 75.9% - 0s 0 2 0.96981 0 23 4.00000 0.96981 75.8% - 0s Cutting planes: Gomory: 4 Mod-K: 7 Explored 46 nodes (530 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%