Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:21:41 2012 Optimize a model with 429 rows, 304 columns and 1374 nonzeros Presolve time: 0.00s Presolved: 429 rows, 304 columns, 1374 nonzeros Variable types: 0 continuous, 304 integer (304 binary) Found heuristic solution: objective 104.0000000 Root relaxation: objective 0.000000e+00, 129 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 89 104.00000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s 0 0 0.44624 0 91 74.00000 0.44624 99.4% - 0s H 0 0 73.0000000 0.44624 99.4% - 0s 0 0 1.02174 0 92 73.00000 1.02174 98.6% - 0s H 0 0 70.0000000 1.02174 98.5% - 0s 0 0 1.03321 0 93 70.00000 1.03321 98.5% - 0s 0 0 1.03321 0 93 70.00000 1.03321 98.5% - 0s 0 2 1.04804 0 93 70.00000 1.04804 98.5% - 0s H 54 52 54.0000000 3.52413 93.5% 31.9 0s * 104 88 27 52.0000000 3.53325 93.2% 30.3 0s * 254 218 27 51.0000000 7.57277 85.2% 30.0 0s * 261 211 31 50.0000000 7.57277 84.9% 29.4 0s H 459 371 48.0000000 9.90020 79.4% 31.2 0s * 1658 615 32 46.0000000 18.75000 59.2% 28.6 2s H 1751 591 45.0000000 19.05882 57.6% 28.5 2s H 2110 693 44.0000000 21.02500 52.2% 28.0 2s H 2248 722 43.0000000 21.14286 50.8% 27.8 2s H 3183 910 42.0000000 23.56522 43.9% 27.1 4s 3959 1027 cutoff 29 42.00000 24.56757 41.5% 26.2 5s 9359 1668 cutoff 29 42.00000 29.40625 30.0% 24.2 10s 15769 1788 37.76316 27 145 42.00000 32.33333 23.0% 22.7 15s 22795 1255 cutoff 29 42.00000 34.56000 17.7% 22.1 20s Explored 28433 nodes (611753 simplex iterations) in 23.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%