Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:16:50 2012 Optimize a model with 421 rows, 297 columns and 1347 nonzeros Presolve time: 0.00s Presolved: 421 rows, 297 columns, 1347 nonzeros Variable types: 0 continuous, 297 integer (297 binary) Found heuristic solution: objective 93.0000000 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 87 93.00000 0.00000 100% - 0s H 0 0 78.0000000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s 0 0 0.66268 0 90 76.00000 0.66268 99.1% - 0s H 0 0 73.0000000 0.66268 99.1% - 0s 0 0 0.71078 0 89 73.00000 0.71078 99.0% - 0s H 0 0 70.0000000 0.71078 99.0% - 0s 0 0 0.74892 0 89 70.00000 0.74892 98.9% - 0s 0 0 0.75468 0 89 70.00000 0.75468 98.9% - 0s 0 0 0.75468 0 89 70.00000 0.75468 98.9% - 0s 0 2 0.78642 0 89 70.00000 0.78642 98.9% - 0s H 27 27 64.0000000 4.51407 92.9% 38.0 0s H 54 52 55.0000000 4.51407 91.8% 26.2 0s * 58 45 37 54.0000000 4.51407 91.6% 25.0 0s * 150 116 33 52.0000000 9.83526 81.1% 25.3 0s * 152 108 34 51.0000000 9.83526 80.7% 25.1 0s * 205 145 27 48.0000000 10.06306 79.0% 25.6 0s * 338 234 26 47.0000000 13.66667 70.9% 25.9 0s H 649 375 46.0000000 19.10606 58.5% 25.8 1s * 1018 452 35 45.0000000 19.10606 57.5% 27.1 1s * 1214 451 33 44.0000000 19.10606 56.6% 27.1 1s H 2698 720 43.0000000 25.84810 39.9% 25.7 3s 4344 952 cutoff 27 43.00000 28.10959 34.6% 24.5 5s * 6085 1121 30 42.0000000 30.00000 28.6% 23.8 6s 9870 1154 35.98701 23 135 42.00000 32.52381 22.6% 23.1 10s 16776 489 39.37879 26 131 42.00000 36.40000 13.3% 22.0 15s Explored 18037 nodes (389983 simplex iterations) in 15.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%