Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:18 2012 Optimize a model with 171 rows, 125 columns and 550 nonzeros Presolve time: 0.00s Presolved: 171 rows, 125 columns, 550 nonzeros Variable types: 0 continuous, 125 integer (125 binary) Found heuristic solution: objective 37.0000000 Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 57 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 40 36.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s 0 0 0.64486 0 43 29.00000 0.64486 97.8% - 0s H 0 0 28.0000000 0.64486 97.7% - 0s 0 0 0.70000 0 42 28.00000 0.70000 97.5% - 0s H 0 0 26.0000000 0.70000 97.3% - 0s 0 0 0.80932 0 44 26.00000 0.80932 96.9% - 0s 0 0 0.81630 0 44 26.00000 0.81630 96.9% - 0s 0 2 0.86667 0 44 26.00000 0.86667 96.7% - 0s * 29 25 17 25.0000000 3.33333 86.7% 21.5 0s * 32 24 16 24.0000000 3.33333 86.1% 19.6 0s * 51 26 13 19.0000000 3.41250 82.0% 19.8 0s * 230 26 13 18.0000000 12.93333 28.1% 18.1 0s Cutting planes: Gomory: 1 Mod-K: 4 Explored 290 nodes (5203 simplex iterations) in 0.15 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%