Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:32:06 2012 Optimize a model with 283 rows, 218 columns and 923 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 283 rows, 217 columns, 922 nonzeros Variable types: 0 continuous, 217 integer (216 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 0.000000e+00, 98 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 73 60.00000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s H 0 0 55.0000000 0.00000 100% - 0s 0 0 0.32110 0 75 55.00000 0.32110 99.4% - 0s H 0 0 51.0000000 0.32110 99.4% - 0s 0 0 0.94839 0 77 51.00000 0.94839 98.1% - 0s 0 0 0.94953 0 79 51.00000 0.94953 98.1% - 0s 0 0 0.94953 0 79 51.00000 0.94953 98.1% - 0s H 0 0 35.0000000 0.94953 97.3% - 0s 0 2 0.95508 0 79 35.00000 0.95508 97.3% - 0s * 37 29 24 27.0000000 3.23092 88.0% 27.5 0s * 166 98 13 26.0000000 8.69008 66.6% 27.8 0s * 211 103 15 25.0000000 9.46147 62.2% 27.2 0s * 1600 97 24 24.0000000 16.93750 29.4% 21.1 1s Explored 2038 nodes (41890 simplex iterations) in 1.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%