Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:22:37 2012 Optimize a model with 471 rows, 326 columns and 1501 nonzeros Presolve time: 0.00s Presolved: 471 rows, 326 columns, 1501 nonzeros Variable types: 0 continuous, 326 integer (326 binary) Found heuristic solution: objective 102.0000000 Root relaxation: objective 0.000000e+00, 127 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 90 102.00000 0.00000 100% - 0s H 0 0 90.0000000 0.00000 100% - 0s 0 0 0.61111 0 91 90.00000 0.61111 99.3% - 0s H 0 0 88.0000000 0.61111 99.3% - 0s 0 0 1.00000 0 95 88.00000 1.00000 98.9% - 0s H 0 0 87.0000000 1.00000 98.9% - 0s 0 0 1.03774 0 94 87.00000 1.03774 98.8% - 0s H 0 0 85.0000000 1.03774 98.8% - 0s 0 0 1.05557 0 94 85.00000 1.05557 98.8% - 0s 0 0 1.07178 0 96 85.00000 1.07178 98.7% - 0s 0 0 1.08911 0 95 85.00000 1.08911 98.7% - 0s 0 0 1.09659 0 97 85.00000 1.09659 98.7% - 0s H 0 0 71.0000000 1.09659 98.5% - 0s 0 2 1.16334 0 97 71.00000 1.16334 98.4% - 0s H 44 44 69.0000000 5.38876 92.2% 33.4 0s H 48 48 63.0000000 5.38876 91.4% 31.1 0s H 55 46 62.0000000 5.38876 91.3% 28.8 0s * 103 84 29 59.0000000 5.51513 90.7% 28.8 0s * 266 205 35 56.0000000 9.35632 83.3% 29.1 0s * 419 332 23 55.0000000 11.20285 79.6% 30.8 0s * 742 467 36 52.0000000 14.12251 72.8% 30.7 1s H 743 436 51.0000000 14.12251 72.3% 30.7 1s * 882 477 35 49.0000000 14.12251 71.2% 31.5 1s * 1724 530 35 48.0000000 20.97500 56.3% 29.1 2s H 2248 670 47.0000000 23.85075 49.3% 28.1 3s 3759 1037 40.50000 25 153 47.00000 27.89394 40.7% 26.3 5s 8644 1747 46.00000 28 162 47.00000 32.92982 29.9% 23.6 10s 14644 2076 41.48718 25 159 47.00000 36.50000 22.3% 22.3 15s 21216 1936 cutoff 28 47.00000 38.57627 17.9% 21.2 20s 28666 1342 42.80000 26 154 47.00000 40.52174 13.8% 20.3 25s Explored 34407 nodes (675539 simplex iterations) in 28.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%