Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:56:14 2012 Optimize a model with 463 rows, 327 columns and 1482 nonzeros Presolve time: 0.00s Presolved: 463 rows, 327 columns, 1482 nonzeros Variable types: 0 continuous, 327 integer (327 binary) Found heuristic solution: objective 106.0000000 Root relaxation: objective 0.000000e+00, 128 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 95 106.00000 0.00000 100% - 0s H 0 0 99.0000000 0.00000 100% - 0s H 0 0 93.0000000 0.00000 100% - 0s 0 0 0.56714 0 96 93.00000 0.56714 99.4% - 0s H 0 0 86.0000000 0.56714 99.3% - 0s 0 0 1.00154 0 97 86.00000 1.00154 98.8% - 0s H 0 0 74.0000000 1.00154 98.6% - 0s 0 0 1.32316 0 98 74.00000 1.32316 98.2% - 0s 0 0 1.32549 0 99 74.00000 1.32549 98.2% - 0s 0 2 1.33021 0 99 74.00000 1.33021 98.2% - 0s H 40 40 63.0000000 4.72660 92.5% 36.5 0s H 40 40 61.0000000 4.72660 92.3% 36.5 0s * 51 50 32 59.0000000 4.72660 92.0% 31.1 0s * 55 43 36 58.0000000 4.72660 91.9% 29.3 0s * 106 83 32 57.0000000 4.81341 91.6% 28.9 0s H 146 102 53.0000000 7.65042 85.6% 29.7 0s * 369 294 24 51.0000000 9.60979 81.2% 36.9 0s * 1180 544 31 50.0000000 17.31111 65.4% 34.4 2s * 1946 594 32 49.0000000 23.92857 51.2% 31.1 2s * 2089 630 34 48.0000000 24.22581 49.5% 30.8 3s H 2527 695 47.0000000 25.00000 46.8% 29.9 3s 3363 852 44.67568 25 155 47.00000 27.00000 42.6% 28.9 5s H 4470 998 46.0000000 28.57317 37.9% 27.9 6s * 6755 1140 29 45.0000000 31.00000 31.1% 26.8 8s 7998 1193 42.40000 25 158 45.00000 31.76744 29.4% 26.5 10s 13328 1095 41.94872 23 149 45.00000 34.76812 22.7% 25.3 15s 19078 549 43.12162 24 149 45.00000 37.54545 16.6% 24.7 20s Explored 20917 nodes (508221 simplex iterations) in 21.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%