Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:26:07 2012 Optimize a model with 459 rows, 321 columns and 1466 nonzeros Presolve time: 0.00s Presolved: 459 rows, 321 columns, 1466 nonzeros Variable types: 0 continuous, 321 integer (321 binary) Found heuristic solution: objective 111.0000000 Root relaxation: objective 0.000000e+00, 124 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 92 111.00000 0.00000 100% - 0s H 0 0 88.0000000 0.00000 100% - 0s 0 0 0.56098 0 93 88.00000 0.56098 99.4% - 0s H 0 0 85.0000000 0.56098 99.3% - 0s 0 0 1.12297 0 96 85.00000 1.12297 98.7% - 0s H 0 0 84.0000000 1.12297 98.7% - 0s 0 0 1.17553 0 95 84.00000 1.17553 98.6% - 0s H 0 0 83.0000000 1.17553 98.6% - 0s 0 0 1.17908 0 97 83.00000 1.17908 98.6% - 0s 0 0 1.17908 0 97 83.00000 1.17908 98.6% - 0s 0 2 1.18872 0 97 83.00000 1.18872 98.6% - 0s * 52 46 32 57.0000000 4.43124 92.2% 28.8 0s * 88 69 20 50.0000000 4.49225 91.0% 30.7 0s * 470 299 26 49.0000000 14.48444 70.4% 30.0 0s * 1158 457 28 48.0000000 16.52874 65.6% 30.5 1s 3659 1026 34.70732 19 151 48.00000 28.13208 41.4% 26.4 5s * 7524 1566 33 47.0000000 32.11905 31.7% 24.5 9s 8503 1640 38.37037 20 157 47.00000 32.66667 30.5% 24.2 10s *13109 1768 28 46.0000000 35.25000 23.4% 23.6 14s 14005 1741 38.70370 20 152 46.00000 35.63235 22.5% 23.4 15s 20008 1286 44.02597 22 159 46.00000 38.05172 17.3% 22.8 20s Explored 25903 nodes (572910 simplex iterations) in 24.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%