Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:09:43 2012 Optimize a model with 829 rows, 131 columns and 1658 nonzeros Presolve removed 321 rows and 0 columns Presolve time: 0.01s Presolved: 508 rows, 131 columns, 1309 nonzeros Variable types: 0 continuous, 131 integer (131 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.441276e+01, 350 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.41276 0 130 30.00000 44.41276 48.0% - 0s H 0 0 33.0000000 44.41276 34.6% - 0s H 0 0 35.0000000 44.41276 26.9% - 0s 0 0 44.02139 0 128 35.00000 44.02139 25.8% - 0s 0 0 43.76710 0 130 35.00000 43.76710 25.0% - 0s 0 0 43.60410 0 129 35.00000 43.60410 24.6% - 0s 0 0 43.45828 0 127 35.00000 43.45828 24.2% - 0s 0 0 43.37574 0 127 35.00000 43.37574 23.9% - 0s 0 0 43.19748 0 128 35.00000 43.19748 23.4% - 0s 0 0 43.08031 0 123 35.00000 43.08031 23.1% - 0s 0 0 43.03350 0 124 35.00000 43.03350 23.0% - 0s 0 0 42.98254 0 128 35.00000 42.98254 22.8% - 0s 0 0 42.94618 0 127 35.00000 42.94618 22.7% - 0s 0 0 42.88371 0 127 35.00000 42.88371 22.5% - 0s 0 0 42.85288 0 128 35.00000 42.85288 22.4% - 0s H 0 0 36.0000000 42.85288 19.0% - 0s 0 0 42.78433 0 129 36.00000 42.78433 18.8% - 0s 0 0 42.77590 0 130 36.00000 42.77590 18.8% - 0s 0 0 42.77590 0 130 36.00000 42.77590 18.8% - 0s 0 2 42.77411 0 130 36.00000 42.77411 18.8% - 0s H 54 22 37.0000000 42.39986 14.6% 51.7 0s Cutting planes: Clique: 2 Zero half: 54 Explored 558 nodes (23174 simplex iterations) in 1.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.700000000000e+01, best bound 3.700000000000e+01, gap 0.0%