Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:45:15 2012 Optimize a model with 189 rows, 140 columns and 610 nonzeros Presolve time: 0.00s Presolved: 189 rows, 140 columns, 610 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 66 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 45 43.00000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.78370 0 47 37.00000 0.78370 97.9% - 0s 0 0 0.86667 0 48 37.00000 0.86667 97.7% - 0s H 0 0 35.0000000 0.86667 97.5% - 0s H 0 0 25.0000000 0.86667 96.5% - 0s 0 2 0.88333 0 48 25.00000 0.88333 96.5% - 0s * 24 24 15 21.0000000 4.13333 80.3% 25.8 0s * 70 42 13 20.0000000 6.55385 67.2% 20.5 0s * 254 63 12 19.0000000 11.55556 39.2% 19.4 0s * 284 51 11 18.0000000 11.92549 33.7% 18.5 0s Cutting planes: Gomory: 1 Mod-K: 2 Explored 407 nodes (7470 simplex iterations) in 0.19 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%