Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:45:18 2012 Optimize a model with 511 rows, 350 columns and 1625 nonzeros Presolve time: 0.00s Presolved: 511 rows, 350 columns, 1625 nonzeros Variable types: 0 continuous, 350 integer (350 binary) Found heuristic solution: objective 115.0000000 Root relaxation: objective 0.000000e+00, 150 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 95 115.00000 0.00000 100% - 0s H 0 0 105.0000000 0.00000 100% - 0s H 0 0 95.0000000 0.00000 100% - 0s 0 0 0.77155 0 97 95.00000 0.77155 99.2% - 0s H 0 0 93.0000000 0.77155 99.2% - 0s 0 0 0.80287 0 97 93.00000 0.80287 99.1% - 0s H 0 0 91.0000000 0.80287 99.1% - 0s 0 0 0.80853 0 97 91.00000 0.80853 99.1% - 0s H 0 0 83.0000000 0.80853 99.0% - 0s H 0 0 81.0000000 0.80853 99.0% - 0s 0 2 0.81128 0 97 81.00000 0.81128 99.0% - 0s * 47 44 28 70.0000000 5.18919 92.6% 34.4 0s * 97 81 31 67.0000000 5.32118 92.1% 31.4 0s * 144 108 28 62.0000000 7.00000 88.7% 32.0 0s * 278 208 26 59.0000000 13.29032 77.5% 35.3 0s * 1402 517 35 57.0000000 25.61905 55.1% 31.6 2s H 2300 660 56.0000000 31.17544 44.3% 29.9 3s 3178 843 40.78313 21 159 56.00000 33.54717 40.1% 29.3 5s H 6740 1415 55.0000000 38.00000 30.9% 27.7 9s 7178 1463 48.30769 24 168 55.00000 38.27273 30.4% 27.5 10s 11808 1743 53.49351 25 171 55.00000 41.64286 24.3% 26.5 15s 17023 1650 53.03947 25 171 55.00000 44.16327 19.7% 25.8 20s 22503 1292 51.40000 24 172 55.00000 46.00000 16.4% 25.0 25s *25656 852 33 54.0000000 47.16667 12.7% 24.9 27s 27888 225 52.80519 25 169 54.00000 50.87500 5.79% 24.5 30s Explored 28135 nodes (688520 simplex iterations) in 30.13 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%