Gurobi 5.0.1 (linux64) logging started Sun Nov 18 02:53:34 2012 Optimize a model with 425 rows, 278 columns and 1338 nonzeros Presolve time: 0.00s Presolved: 425 rows, 278 columns, 1338 nonzeros Variable types: 0 continuous, 278 integer (278 binary) Found heuristic solution: objective 98.0000000 Root relaxation: objective 0.000000e+00, 115 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 66 98.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 0 0.95833 0 68 85.00000 0.95833 98.9% - 0s H 0 0 82.0000000 0.95833 98.8% - 0s 0 0 1.01389 0 68 82.00000 1.01389 98.8% - 0s H 0 0 79.0000000 1.01389 98.7% - 0s 0 0 1.04167 0 68 79.00000 1.04167 98.7% - 0s 0 0 1.08333 0 68 79.00000 1.08333 98.6% - 0s 0 0 1.10417 0 68 79.00000 1.10417 98.6% - 0s 0 0 1.14015 0 76 79.00000 1.14015 98.6% - 0s 0 0 1.14583 0 68 79.00000 1.14583 98.5% - 0s 0 0 1.16667 0 78 79.00000 1.16667 98.5% - 0s 0 0 1.16667 0 68 79.00000 1.16667 98.5% - 0s 0 0 1.16667 0 68 79.00000 1.16667 98.5% - 0s 0 0 1.16667 0 68 79.00000 1.16667 98.5% - 0s 0 2 1.16667 0 68 79.00000 1.16667 98.5% - 0s H 40 40 76.0000000 5.36806 92.9% 35.6 0s * 51 51 30 74.0000000 5.36806 92.7% 31.0 0s H 54 45 72.0000000 5.36806 92.5% 29.3 0s * 89 74 25 66.0000000 5.43636 91.8% 28.8 0s * 126 100 24 64.0000000 8.79167 86.3% 28.5 0s * 279 225 24 61.0000000 13.11905 78.5% 27.9 0s * 895 523 37 60.0000000 16.88739 71.9% 29.9 1s * 928 506 37 59.0000000 16.88739 71.4% 29.7 1s * 931 480 33 58.0000000 16.88739 70.9% 29.6 1s * 1148 499 32 57.0000000 16.88739 70.4% 30.0 1s * 1393 501 30 56.0000000 22.56364 59.7% 30.0 1s * 1673 543 30 55.0000000 25.79592 53.1% 29.7 2s 4175 1140 53.00000 23 136 55.00000 33.41176 39.3% 27.2 5s 9905 1873 45.52941 22 135 55.00000 39.85714 27.5% 24.9 10s *12663 1970 30 54.0000000 41.31250 23.5% 24.3 12s 16552 1854 51.68085 24 135 54.00000 43.06522 20.2% 23.8 15s 23969 1205 51.41176 24 142 54.00000 46.00000 14.8% 22.8 20s Explored 28437 nodes (633469 simplex iterations) in 22.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%