Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:18 2012 Optimize a model with 53 rows, 38 columns and 168 nonzeros Presolve time: 0.00s Presolved: 53 rows, 38 columns, 168 nonzeros Variable types: 0 continuous, 38 integer (38 binary) Found heuristic solution: objective 12.0000000 Root relaxation: objective 0.000000e+00, 17 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 12 12.00000 0.00000 100% - 0s 0 0 0.60000 0 13 12.00000 0.60000 95.0% - 0s 0 0 1.00000 0 12 12.00000 1.00000 91.7% - 0s 0 0 1.23944 0 17 12.00000 1.23944 89.7% - 0s H 0 0 10.0000000 1.23944 87.6% - 0s 0 0 1.42857 0 17 10.00000 1.42857 85.7% - 0s 0 0 1.43609 0 18 10.00000 1.43609 85.6% - 0s 0 2 1.43647 0 18 10.00000 1.43647 85.6% - 0s * 8 8 6 9.0000000 3.50000 61.1% 10.9 0s * 15 6 4 8.0000000 4.00000 50.0% 9.6 0s Cutting planes: Gomory: 4 Mod-K: 2 Explored 25 nodes (308 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%