Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:09:23 2012 Optimize a model with 481 rows, 446 columns and 1646 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 481 rows, 430 columns, 1630 nonzeros Variable types: 0 continuous, 430 integer (429 binary) Found heuristic solution: objective 88.0000000 Root relaxation: objective 0.000000e+00, 245 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 0 179 88.00000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s 0 0 0.46361 0 180 61.00000 0.46361 99.2% - 0s H 0 0 56.0000000 0.46361 99.2% - 0s 0 0 1.00000 0 184 56.00000 1.00000 98.2% - 0s H 0 0 47.0000000 1.00000 97.9% - 0s H 0 0 45.0000000 1.00000 97.8% - 0s 0 0 1.00000 0 183 45.00000 1.00000 97.8% - 0s H 0 0 42.0000000 1.00000 97.6% - 0s 0 0 1.00000 0 184 42.00000 1.00000 97.6% - 0s 0 0 1.00000 0 183 42.00000 1.00000 97.6% - 0s H 0 0 40.0000000 1.00000 97.5% - 0s H 0 0 38.0000000 1.00000 97.4% - 0s H 0 0 35.0000000 1.00000 97.1% - 0s 0 2 1.00000 0 181 35.00000 1.00000 97.1% - 0s H 27 27 20.0000000 1.00000 95.0% 50.6 0s * 39 30 22 19.0000000 1.00000 94.7% 40.3 0s * 154 59 24 16.0000000 3.71429 76.8% 36.5 0s Cutting planes: Gomory: 3 Mod-K: 3 Explored 472 nodes (18609 simplex iterations) in 0.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%