Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:16:28 2012 Optimize a model with 903 rows, 135 columns and 1806 nonzeros Presolve removed 356 rows and 0 columns Presolve time: 0.01s Presolved: 547 rows, 135 columns, 1411 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 4.447383e+01, 370 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.47383 0 132 31.00000 44.47383 43.5% - 0s 0 0 44.27812 0 132 31.00000 44.27812 42.8% - 0s 0 0 43.80434 0 130 31.00000 43.80434 41.3% - 0s H 0 0 32.0000000 43.80434 36.9% - 0s 0 0 43.47739 0 132 32.00000 43.47739 35.9% - 0s 0 0 43.41434 0 132 32.00000 43.41434 35.7% - 0s 0 0 43.25203 0 132 32.00000 43.25203 35.2% - 0s 0 0 43.14081 0 134 32.00000 43.14081 34.8% - 0s 0 0 43.12316 0 134 32.00000 43.12316 34.8% - 0s 0 0 43.08969 0 134 32.00000 43.08969 34.7% - 0s 0 0 43.04941 0 134 32.00000 43.04941 34.5% - 0s 0 0 43.04941 0 134 32.00000 43.04941 34.5% - 0s 0 0 43.04941 0 134 32.00000 43.04941 34.5% - 0s H 0 0 33.0000000 43.04941 30.5% - 0s 0 2 43.04466 0 133 33.00000 43.04466 30.4% - 0s * 42 29 13 34.0000000 42.87671 26.1% 58.2 0s * 57 35 12 35.0000000 42.68919 22.0% 54.7 0s H 138 58 36.0000000 41.96433 16.6% 47.8 0s Explored 3369 nodes (96431 simplex iterations) in 4.29 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%