Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:19:35 2012 Optimize a model with 4689 rows, 138 columns and 9378 nonzeros Presolve removed 3367 rows and 0 columns Presolve time: 0.17s Presolved: 1322 rows, 138 columns, 9270 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.818942e+01, 655 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18.18942 0 134 8.00000 18.18942 127% - 0s 0 0 17.46062 0 138 8.00000 17.46062 118% - 0s 0 0 17.37098 0 136 8.00000 17.37098 117% - 0s H 0 0 9.0000000 17.37098 93.0% - 0s 0 0 17.25409 0 138 9.00000 17.25409 91.7% - 0s 0 0 17.22498 0 138 9.00000 17.22498 91.4% - 1s 0 0 17.21238 0 137 9.00000 17.21238 91.2% - 1s 0 0 17.20138 0 138 9.00000 17.20138 91.1% - 1s 0 0 17.19449 0 137 9.00000 17.19449 91.0% - 1s 0 0 17.19176 0 137 9.00000 17.19176 91.0% - 1s 0 0 17.18838 0 137 9.00000 17.18838 91.0% - 2s 0 0 17.18768 0 138 9.00000 17.18768 91.0% - 2s 0 0 17.18753 0 138 9.00000 17.18753 91.0% - 2s 0 2 17.18496 0 138 9.00000 17.18496 90.9% - 3s 309 205 13.14827 10 71 9.00000 15.84217 76.0% 73.8 5s 609 331 10.94541 25 138 9.00000 14.31953 59.1% 67.8 10s 880 384 12.59951 27 64 9.00000 14.17309 57.5% 91.5 15s H 1019 320 10.0000000 13.78612 37.9% 84.2 15s 1712 51 11.39676 41 50 10.00000 11.50459 15.0% 65.9 20s Cutting planes: Clique: 55 Explored 1783 nodes (115084 simplex iterations) in 20.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%