Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:08:57 2012 Optimize a model with 871 rows, 131 columns and 1742 nonzeros Presolve removed 341 rows and 0 columns Presolve time: 0.01s Presolved: 530 rows, 131 columns, 1362 nonzeros Variable types: 0 continuous, 131 integer (131 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.382959e+01, 351 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.82959 0 131 29.00000 43.82959 51.1% - 0s H 0 0 31.0000000 43.82959 41.4% - 0s 0 0 43.48368 0 129 31.00000 43.48368 40.3% - 0s 0 0 43.32606 0 130 31.00000 43.32606 39.8% - 0s 0 0 43.19856 0 131 31.00000 43.19856 39.4% - 0s 0 0 43.14168 0 131 31.00000 43.14168 39.2% - 0s 0 0 43.02847 0 131 31.00000 43.02847 38.8% - 0s 0 0 42.90411 0 131 31.00000 42.90411 38.4% - 0s 0 0 42.73655 0 131 31.00000 42.73655 37.9% - 0s 0 0 42.68857 0 130 31.00000 42.68857 37.7% - 0s 0 0 42.65731 0 129 31.00000 42.65731 37.6% - 0s 0 0 42.58882 0 131 31.00000 42.58882 37.4% - 0s 0 0 42.54132 0 131 31.00000 42.54132 37.2% - 0s 0 0 42.47025 0 131 31.00000 42.47025 37.0% - 0s H 0 0 32.0000000 42.47025 32.7% - 0s 0 0 42.44275 0 129 32.00000 42.44275 32.6% - 0s 0 0 42.41099 0 131 32.00000 42.41099 32.5% - 0s 0 0 42.35422 0 130 32.00000 42.35422 32.4% - 0s 0 0 42.32830 0 130 32.00000 42.32830 32.3% - 0s 0 0 42.31682 0 129 32.00000 42.31682 32.2% - 0s 0 0 42.30432 0 130 32.00000 42.30432 32.2% - 0s 0 0 42.30432 0 130 32.00000 42.30432 32.2% - 0s 0 2 42.30392 0 130 32.00000 42.30392 32.2% - 0s * 458 195 14 33.0000000 39.75828 20.5% 35.9 0s H 548 181 34.0000000 39.61417 16.5% 35.6 1s 3494 478 35.09474 29 93 34.00000 37.05405 8.98% 30.6 5s Explored 5510 nodes (154553 simplex iterations) in 6.60 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%