Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:14:12 2012 Optimize a model with 908 rows, 134 columns and 1816 nonzeros Presolve removed 338 rows and 0 columns Presolve time: 0.01s Presolved: 570 rows, 134 columns, 1475 nonzeros Variable types: 0 continuous, 134 integer (134 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.472827e+01, 414 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.72827 0 131 30.00000 44.72827 49.1% - 0s 0 0 44.33692 0 131 30.00000 44.33692 47.8% - 0s H 0 0 31.0000000 44.33692 43.0% - 0s 0 0 44.12417 0 130 31.00000 44.12417 42.3% - 0s 0 0 43.82889 0 132 31.00000 43.82889 41.4% - 0s 0 0 43.71401 0 132 31.00000 43.71401 41.0% - 0s 0 0 43.60396 0 132 31.00000 43.60396 40.7% - 0s 0 0 43.54855 0 130 31.00000 43.54855 40.5% - 0s 0 0 43.50800 0 130 31.00000 43.50800 40.3% - 0s 0 0 43.45938 0 132 31.00000 43.45938 40.2% - 0s 0 0 43.43421 0 132 31.00000 43.43421 40.1% - 0s 0 0 43.40779 0 132 31.00000 43.40779 40.0% - 0s 0 0 43.38277 0 132 31.00000 43.38277 39.9% - 0s 0 0 43.36045 0 131 31.00000 43.36045 39.9% - 0s H 0 0 34.0000000 43.36045 27.5% - 0s 0 0 43.35129 0 132 34.00000 43.35129 27.5% - 0s 0 0 43.35129 0 131 34.00000 43.35129 27.5% - 0s 0 2 43.35114 0 131 34.00000 43.35114 27.5% - 0s * 804 302 37 35.0000000 40.22682 14.9% 42.4 1s 3156 679 36.11429 33 94 35.00000 38.71111 10.6% 33.4 5s Explored 6007 nodes (177188 simplex iterations) in 7.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%