Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:37:28 2012 Optimize a model with 497 rows, 467 columns and 1707 nonzeros Presolve removed 0 rows and 21 columns Presolve time: 0.00s Presolved: 497 rows, 446 columns, 1686 nonzeros Variable types: 0 continuous, 446 integer (445 binary) Found heuristic solution: objective 90.0000000 Root relaxation: objective 0.000000e+00, 241 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 0 185 90.00000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s 0 0 0.25545 0 187 63.00000 0.25545 100% - 0s H 0 0 59.0000000 0.25545 100% - 0s 0 0 0.79984 0 192 59.00000 0.79984 98.6% - 0s H 0 0 51.0000000 0.79984 98.4% - 0s 0 0 0.80012 0 194 51.00000 0.80012 98.4% - 0s 0 0 0.80012 0 194 51.00000 0.80012 98.4% - 0s 0 2 0.80262 0 194 51.00000 0.80262 98.4% - 0s H 27 27 50.0000000 1.00000 98.0% 43.8 0s H 81 48 20.0000000 1.00000 95.0% 23.9 0s H 110 51 19.0000000 2.16397 88.6% 27.6 0s H 137 59 17.0000000 2.23076 86.9% 27.4 0s * 651 160 16 16.0000000 8.95238 44.0% 30.7 0s Cutting planes: Gomory: 4 Mod-K: 1 Explored 1264 nodes (36996 simplex iterations) in 1.57 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%