Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:54:46 2012 Optimize a model with 715 rows, 120 columns and 1430 nonzeros Presolve removed 257 rows and 0 columns Presolve time: 0.00s Presolved: 458 rows, 120 columns, 1142 nonzeros Variable types: 0 continuous, 120 integer (120 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.234868e+01, 301 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.34868 0 118 28.00000 42.34868 51.2% - 0s H 0 0 29.0000000 42.34868 46.0% - 0s 0 0 41.54135 0 118 29.00000 41.54135 43.2% - 0s H 0 0 30.0000000 41.54135 38.5% - 0s 0 0 41.35273 0 119 30.00000 41.35273 37.8% - 0s 0 0 41.11794 0 120 30.00000 41.11794 37.1% - 0s 0 0 41.03160 0 120 30.00000 41.03160 36.8% - 0s 0 0 40.94986 0 119 30.00000 40.94986 36.5% - 0s H 0 0 32.0000000 40.94986 28.0% - 0s 0 0 40.83107 0 119 32.00000 40.83107 27.6% - 0s 0 0 40.77056 0 120 32.00000 40.77056 27.4% - 0s 0 0 40.73461 0 120 32.00000 40.73461 27.3% - 0s 0 0 40.70446 0 119 32.00000 40.70446 27.2% - 0s 0 0 40.56302 0 120 32.00000 40.56302 26.8% - 0s 0 0 40.50378 0 120 32.00000 40.50378 26.6% - 0s 0 0 40.45663 0 119 32.00000 40.45663 26.4% - 0s 0 0 40.44064 0 119 32.00000 40.44064 26.4% - 0s 0 0 40.44064 0 119 32.00000 40.44064 26.4% - 0s 0 2 40.44040 0 119 32.00000 40.44040 26.4% - 0s H 27 17 33.0000000 40.32131 22.2% 40.6 0s H 221 55 34.0000000 38.70199 13.8% 32.9 0s 614 119 36.36364 10 119 34.00000 37.58506 10.5% 29.8 5s H 1375 48 35.0000000 36.50000 4.29% 31.0 7s Cutting planes: Gomory: 2 Zero half: 47 Explored 1437 nodes (44410 simplex iterations) in 7.09 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%