Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:58:52 2012 Optimize a model with 744 rows, 124 columns and 1488 nonzeros Presolve removed 271 rows and 0 columns Presolve time: 0.00s Presolved: 473 rows, 124 columns, 1193 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.228015e+01, 332 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.28015 0 124 30.00000 42.28015 40.9% - 0s 0 0 41.87756 0 123 30.00000 41.87756 39.6% - 0s H 0 0 31.0000000 41.87756 35.1% - 0s 0 0 41.82652 0 122 31.00000 41.82652 34.9% - 0s 0 0 41.75105 0 124 31.00000 41.75105 34.7% - 0s 0 0 41.67182 0 123 31.00000 41.67182 34.4% - 0s 0 0 41.62869 0 123 31.00000 41.62869 34.3% - 0s 0 0 41.54322 0 124 31.00000 41.54322 34.0% - 0s 0 0 41.33498 0 123 31.00000 41.33498 33.3% - 0s 0 0 41.11008 0 122 31.00000 41.11008 32.6% - 0s 0 0 41.01617 0 122 31.00000 41.01617 32.3% - 0s 0 0 40.97043 0 121 31.00000 40.97043 32.2% - 0s 0 0 40.88686 0 124 31.00000 40.88686 31.9% - 0s 0 0 40.85342 0 121 31.00000 40.85342 31.8% - 0s 0 0 40.77749 0 124 31.00000 40.77749 31.5% - 0s 0 0 40.70618 0 123 31.00000 40.70618 31.3% - 0s H 0 0 32.0000000 40.70618 27.2% - 0s 0 0 40.66191 0 123 32.00000 40.66191 27.1% - 0s 0 0 40.60687 0 122 32.00000 40.60687 26.9% - 0s 0 0 40.59906 0 123 32.00000 40.59906 26.9% - 0s 0 0 40.59906 0 123 32.00000 40.59906 26.9% - 0s 0 2 40.59779 0 123 32.00000 40.59779 26.9% - 0s H 33 17 34.0000000 40.16586 18.1% 45.7 0s Cutting planes: Clique: 1 Zero half: 53 Explored 1009 nodes (30905 simplex iterations) in 1.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%