Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:35:49 2012 Optimize a model with 9008 rows, 1122 columns and 27982 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 9039 rows, 1120 columns, 30990 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.362637e+00, 6928 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.36264 0 1070 33.00000 3.36264 89.8% - 1s H 0 0 32.0000000 3.36264 89.5% - 1s 0 0 4.00000 0 113 32.00000 4.00000 87.5% - 2s H 0 0 29.0000000 4.00000 86.2% - 2s H 0 0 9.0000000 4.00000 55.6% - 2s 0 0 4.66667 0 242 9.00000 4.66667 48.1% - 2s 0 0 4.77726 0 991 9.00000 4.77726 46.9% - 2s 0 0 4.96000 0 849 9.00000 4.96000 44.9% - 3s 0 0 4.96000 0 856 9.00000 4.96000 44.9% - 3s 0 0 4.96000 0 743 9.00000 4.96000 44.9% - 5s 0 2 7.00000 0 743 9.00000 7.00000 22.2% - 6s H 27 4 8.0000000 7.00000 12.5% 144 7s 133 58 7.00000 9 90 8.00000 7.00000 12.5% 112 10s 290 61 7.00000 10 22 8.00000 7.00000 12.5% 124 15s 528 69 7.00000 14 81 8.00000 7.00000 12.5% 122 20s 606 76 7.00000 15 144 8.00000 7.00000 12.5% 121 30s 608 78 7.00000 15 55 8.00000 7.00000 12.5% 121 36s 610 79 7.00000 12 22 8.00000 7.00000 12.5% 121 41s 612 80 7.00000 15 152 8.00000 7.00000 12.5% 120 48s 613 81 7.00000 12 129 8.00000 7.00000 12.5% 120 52s 614 82 7.00000 20 136 8.00000 7.00000 12.5% 120 57s 615 82 7.00000 24 111 8.00000 7.00000 12.5% 120 62s 616 83 7.00000 7 121 8.00000 7.00000 12.5% 119 67s 618 84 7.00000 15 121 8.00000 7.00000 12.5% 119 70s 622 88 7.00000 15 144 8.00000 7.00000 12.5% 255 79s 623 89 7.00000 15 151 8.00000 7.00000 12.5% 255 81s 625 90 7.00000 12 77 8.00000 7.00000 12.5% 254 85s 628 92 7.00000 15 104 8.00000 7.00000 12.5% 253 93s 630 94 7.00000 12 93 8.00000 7.00000 12.5% 252 95s 634 98 7.00000 32 98 8.00000 7.00000 12.5% 335 101s 645 105 7.00000 38 70 8.00000 7.00000 12.5% 336 105s 678 96 infeasible 40 8.00000 7.00000 12.5% 347 110s 742 68 infeasible 38 8.00000 7.00000 12.5% 356 115s 805 48 infeasible 39 8.00000 7.00000 12.5% 367 120s 861 26 7.00000 33 122 8.00000 7.00000 12.5% 376 125s 902 19 7.00000 38 96 8.00000 7.00000 12.5% 382 130s 954 18 infeasible 43 8.00000 7.00000 12.5% 389 135s 1000 14 infeasible 40 8.00000 7.00000 12.5% 399 140s 1060 18 7.00000 35 88 8.00000 7.00000 12.5% 404 145s 1112 16 infeasible 43 8.00000 7.00000 12.5% 411 150s 1162 22 infeasible 38 8.00000 7.00000 12.5% 413 155s 1220 26 7.00000 41 87 8.00000 7.00000 12.5% 415 160s 1292 21 infeasible 43 8.00000 7.00000 12.5% 416 165s 1610 33 7.00000 35 30 8.00000 7.00000 12.5% 352 170s 1913 7 infeasible 49 8.00000 7.00000 12.5% 318 175s Cutting planes: Clique: 7 Zero half: 5 Explored 2236 nodes (655822 simplex iterations) in 176.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%