Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:47:21 2012 Optimize a model with 255 rows, 180 columns and 815 nonzeros Presolve time: 0.00s Presolved: 255 rows, 180 columns, 815 nonzeros Variable types: 0 continuous, 180 integer (180 binary) Found heuristic solution: objective 64.0000000 Found heuristic solution: objective 61.0000000 Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 53 61.00000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s 0 0 0.55698 0 55 56.00000 0.55698 99.0% - 0s H 0 0 50.0000000 0.55698 98.9% - 0s 0 0 0.62491 0 55 50.00000 0.62491 98.8% - 0s H 0 0 43.0000000 0.62491 98.5% - 0s 0 0 0.65499 0 56 43.00000 0.65499 98.5% - 0s 0 0 0.67146 0 57 43.00000 0.67146 98.4% - 0s 0 0 0.78642 0 57 43.00000 0.78642 98.2% - 0s 0 0 0.81244 0 58 43.00000 0.81244 98.1% - 0s 0 0 0.81461 0 59 43.00000 0.81461 98.1% - 0s 0 0 0.81461 0 59 43.00000 0.81461 98.1% - 0s H 0 0 38.0000000 0.81461 97.9% - 0s 0 2 0.85360 0 59 38.00000 0.85360 97.8% - 0s * 37 28 22 37.0000000 3.11294 91.6% 22.7 0s H 54 40 35.0000000 3.15778 91.0% 22.5 0s H 162 114 34.0000000 8.54839 74.9% 19.9 0s H 211 134 32.0000000 8.69714 72.8% 18.8 0s * 235 137 21 31.0000000 8.78545 71.7% 17.9 0s H 243 131 30.0000000 8.78545 70.7% 17.5 0s * 392 175 18 29.0000000 11.62222 59.9% 16.7 0s * 1245 162 27 28.0000000 18.09091 35.4% 19.3 0s * 2334 48 28 27.0000000 23.39024 13.4% 18.0 1s Explored 2417 nodes (43538 simplex iterations) in 1.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%