Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:33:32 2012 Optimize a model with 975 rows, 141 columns and 1950 nonzeros Presolve removed 367 rows and 0 columns Presolve time: 0.01s Presolved: 608 rows, 141 columns, 1553 nonzeros Variable types: 0 continuous, 141 integer (141 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.712538e+01, 408 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47.12538 0 140 30.00000 47.12538 57.1% - 0s 0 0 46.77546 0 139 30.00000 46.77546 55.9% - 0s H 0 0 31.0000000 46.77546 50.9% - 0s 0 0 46.57978 0 140 31.00000 46.57978 50.3% - 0s 0 0 46.41235 0 141 31.00000 46.41235 49.7% - 0s 0 0 46.18520 0 141 31.00000 46.18520 49.0% - 0s 0 0 46.04594 0 140 31.00000 46.04594 48.5% - 0s 0 0 45.91475 0 141 31.00000 45.91475 48.1% - 0s 0 0 45.77290 0 140 31.00000 45.77290 47.7% - 0s 0 0 45.72050 0 140 31.00000 45.72050 47.5% - 0s 0 0 45.68764 0 140 31.00000 45.68764 47.4% - 0s H 0 0 32.0000000 45.68764 42.8% - 0s 0 0 45.67433 0 141 32.00000 45.67433 42.7% - 0s 0 0 45.64686 0 141 32.00000 45.64686 42.6% - 0s 0 0 45.64052 0 141 32.00000 45.64052 42.6% - 0s 0 2 45.63862 0 141 32.00000 45.63862 42.6% - 0s H 27 24 34.0000000 45.63830 34.2% 46.3 0s * 294 134 19 35.0000000 43.88319 25.4% 41.0 0s 613 274 38.28571 11 141 35.00000 42.73580 22.1% 40.8 5s H 963 335 36.0000000 42.73580 18.7% 49.9 8s 1618 482 39.41509 31 110 36.00000 41.64238 15.7% 45.7 10s 4138 926 37.08333 27 86 36.00000 39.63830 10.1% 38.3 15s 7782 193 cutoff 24 36.00000 37.80357 5.01% 33.6 20s Cutting planes: Gomory: 3 Zero half: 47 Mod-K: 1 Explored 8057 nodes (267190 simplex iterations) in 20.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0%