Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:02:21 2012 Optimize a model with 801 rows, 127 columns and 1602 nonzeros Presolve removed 321 rows and 0 columns Presolve time: 0.01s Presolved: 480 rows, 127 columns, 1242 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.236364e+01, 329 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.36364 0 123 29.00000 42.36364 46.1% - 0s H 0 0 30.0000000 42.36364 41.2% - 0s 0 0 42.00000 0 124 30.00000 42.00000 40.0% - 0s H 0 0 31.0000000 42.00000 35.5% - 0s 0 0 41.78669 0 126 31.00000 41.78669 34.8% - 0s 0 0 41.39763 0 127 31.00000 41.39763 33.5% - 0s 0 0 41.34714 0 127 31.00000 41.34714 33.4% - 0s H 0 0 32.0000000 41.34714 29.2% - 0s 0 0 41.33752 0 127 32.00000 41.33752 29.2% - 0s 0 0 41.28466 0 127 32.00000 41.28466 29.0% - 0s 0 0 41.24120 0 127 32.00000 41.24120 28.9% - 0s 0 0 41.20897 0 127 32.00000 41.20897 28.8% - 0s 0 0 41.17767 0 127 32.00000 41.17767 28.7% - 0s 0 0 41.11330 0 127 32.00000 41.11330 28.5% - 0s 0 0 41.04376 0 127 32.00000 41.04376 28.3% - 0s 0 0 40.91791 0 127 32.00000 40.91791 27.9% - 0s 0 0 40.86565 0 127 32.00000 40.86565 27.7% - 0s 0 0 40.84951 0 127 32.00000 40.84951 27.7% - 0s 0 0 40.80164 0 127 32.00000 40.80164 27.5% - 0s 0 0 40.78313 0 126 32.00000 40.78313 27.4% - 0s 0 0 40.76003 0 125 32.00000 40.76003 27.4% - 0s 0 0 40.74130 0 126 32.00000 40.74130 27.3% - 0s 0 0 40.74130 0 126 32.00000 40.74130 27.3% - 0s 0 2 40.74093 0 126 32.00000 40.74093 27.3% - 0s H 112 50 33.0000000 39.51148 19.7% 41.9 0s * 518 135 9 34.0000000 38.10000 12.1% 36.9 0s 620 155 35.61111 7 127 34.00000 37.97927 11.7% 35.2 5s 634 165 35.66667 11 127 34.00000 37.97927 11.7% 34.5 10s Cutting planes: Gomory: 1 Zero half: 59 Explored 1957 nodes (70648 simplex iterations) in 13.29 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%