Gurobi 5.6.3 (linux64) logging started Tue Oct 7 20:37:41 2014 Optimize a model with 8002 rows, 4033 columns and 19845 nonzeros Presolve removed 63 rows and 0 columns Presolve time: 0.12s Presolved: 7939 rows, 4033 columns, 19782 nonzeros Variable types: 1 continuous, 4032 integer (4032 binary) Found heuristic solution: objective 1.0783633 Found heuristic solution: objective 0.8529838 Found heuristic solution: objective 0.7029863 Root relaxation: objective 6.488217e-03, 4588 iterations, 0.25 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00649 0 3001 0.70299 0.00649 99.1% - 0s H 0 0 0.6129753 0.00649 98.9% - 0s 0 0 0.00844 0 2304 0.61298 0.00844 98.6% - 5s 0 0 0.01530 0 2239 0.61298 0.01530 97.5% - 7s H 0 0 0.4634337 0.01530 96.7% - 7s 0 0 0.01886 0 1453 0.46343 0.01886 95.9% - 8s H 0 0 0.4289355 0.01886 95.6% - 8s 0 1 0.01886 0 1453 0.42894 0.01886 95.6% - 14s H 1 1 0.4281424 0.01886 95.6% 1707 16s H 3 2 0.3933795 0.06074 84.6% 569 16s H 4 2 0.3880347 0.08156 79.0% 427 17s H 6 4 0.3815754 0.08579 77.5% 284 17s H 6 4 0.3793310 0.08579 77.4% 284 17s H 7 3 0.3771830 0.08923 76.3% 244 17s H 9 5 0.3697772 0.09118 75.3% 190 17s H 10 4 0.3660060 0.09351 74.5% 171 17s H 14 8 0.3217203 0.09758 69.7% 977 22s H 16 9 0.3205120 0.16090 49.8% 855 23s H 18 9 0.3181070 0.16289 48.8% 760 23s H 22 12 0.3074430 0.16297 47.0% 622 24s H 22 11 0.2888215 0.16297 43.6% 622 24s 24 14 0.16507 26 427 0.28882 0.16419 43.2% 855 25s * 59 30 43 0.2820709 0.16530 41.4% 435 26s * 69 32 48 0.2807895 0.16530 41.1% 379 26s H 77 26 0.2669655 0.16548 38.0% 347 26s * 112 34 48 0.2667325 0.16548 38.0% 272 26s * 120 34 30 0.2642666 0.20027 24.2% 257 26s * 124 26 32 0.2614232 0.20172 22.8% 251 26s * 131 25 36 0.2508329 0.20172 19.6% 240 26s Cutting planes: Gomory: 5 MIR: 8 Zero half: 1 Explored 155 nodes (62555 simplex iterations) in 26.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.508329148711e-01, best bound 2.508329148711e-01, gap 0.0%