Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:27:50 2012 Optimize a model with 317 rows, 233 columns and 1023 nonzeros Presolve time: 0.00s Presolved: 317 rows, 233 columns, 1023 nonzeros Variable types: 0 continuous, 233 integer (233 binary) Found heuristic solution: objective 57.0000000 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 74 57.00000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s 0 0 0.58065 0 75 51.00000 0.58065 98.9% - 0s 0 0 1.02841 0 76 51.00000 1.02841 98.0% - 0s 0 0 1.09647 0 76 51.00000 1.09647 97.9% - 0s 0 0 1.11999 0 78 51.00000 1.11999 97.8% - 0s 0 0 1.19457 0 79 51.00000 1.19457 97.7% - 0s 0 0 1.24181 0 81 51.00000 1.24181 97.6% - 0s H 0 0 49.0000000 1.24181 97.5% - 0s 0 0 1.26146 0 89 49.00000 1.26146 97.4% - 0s 0 2 1.28989 0 89 49.00000 1.28989 97.4% - 0s H 27 27 47.0000000 4.63837 90.1% 31.8 0s * 41 41 27 39.0000000 4.63837 88.1% 24.3 0s * 45 37 27 38.0000000 4.63837 87.8% 22.5 0s * 71 54 21 37.0000000 4.72356 87.2% 23.2 0s * 210 139 20 36.0000000 11.18922 68.9% 24.7 0s * 376 206 22 35.0000000 13.40995 61.7% 20.6 0s * 406 199 19 34.0000000 13.89474 59.1% 20.7 0s * 672 277 34 33.0000000 15.70893 52.4% 20.6 0s H 1045 258 31.0000000 15.70893 49.3% 21.9 1s * 1047 237 31 30.0000000 15.70893 47.6% 21.9 1s Explored 2762 nodes (57943 simplex iterations) in 2.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%