Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:41 2012 Optimize a model with 485 rows, 141 columns and 970 nonzeros Presolve removed 73 rows and 3 columns Presolve time: 0.00s Presolved: 412 rows, 138 columns, 863 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.025000e+01, 181 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 60.25000 0 112 48.00000 60.25000 25.5% - 0s 0 0 59.25000 0 114 48.00000 59.25000 23.4% - 0s 0 0 58.53333 0 137 48.00000 58.53333 21.9% - 0s H 0 0 49.0000000 58.53333 19.5% - 0s 0 0 57.56716 0 138 49.00000 57.56716 17.5% - 0s 0 0 56.77778 0 135 49.00000 56.77778 15.9% - 0s H 0 0 50.0000000 56.77778 13.6% - 0s 0 0 56.50000 0 107 50.00000 56.50000 13.0% - 0s 0 0 56.44444 0 131 50.00000 56.44444 12.9% - 0s 0 0 56.33333 0 137 50.00000 56.33333 12.7% - 0s H 0 0 51.0000000 56.33333 10.5% - 0s 0 0 56.16667 0 134 51.00000 56.16667 10.1% - 0s 0 0 56.01927 0 136 51.00000 56.01927 9.84% - 0s 0 0 55.87694 0 138 51.00000 55.87694 9.56% - 0s 0 0 55.67028 0 138 51.00000 55.67028 9.16% - 0s 0 0 55.62655 0 138 51.00000 55.62655 9.07% - 0s 0 0 55.62655 0 136 51.00000 55.62655 9.07% - 0s 0 2 55.62356 0 136 51.00000 55.62356 9.07% - 0s * 23 11 5 52.0000000 55.40018 6.54% 46.0 0s Cutting planes: Gomory: 1 Zero half: 134 Explored 98 nodes (5520 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%