Gurobi 5.6.3 (linux64) logging started Tue Oct 7 20:42:43 2014 Optimize a model with 4900 rows, 4831 columns and 19113 nonzeros Presolve time: 0.12s Presolved: 4900 rows, 4831 columns, 19113 nonzeros Variable types: 1 continuous, 4830 integer (4830 binary) Found heuristic solution: objective 1.2752583 Found heuristic solution: objective 1.0254049 Found heuristic solution: objective 0.9573105 Root relaxation: objective 1.574508e-01, 2278 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.15745 0 660 0.95731 0.15745 83.6% - 0s H 0 0 0.5467942 0.15745 71.2% - 0s H 0 0 0.3679207 0.15745 57.2% - 0s 0 0 0.16322 0 608 0.36792 0.16322 55.6% - 0s 0 0 0.16322 0 656 0.36792 0.16322 55.6% - 0s H 0 0 0.3639834 0.16322 55.2% - 0s 0 0 0.16335 0 608 0.36398 0.16335 55.1% - 1s 0 0 0.16418 0 603 0.36398 0.16418 54.9% - 1s H 0 0 0.3355182 0.16418 51.1% - 1s H 0 0 0.3098580 0.16418 47.0% - 1s 0 0 0.16793 0 483 0.30986 0.16793 45.8% - 1s H 0 0 0.2765634 0.16793 39.3% - 1s 0 2 0.16828 0 483 0.27656 0.16828 39.2% - 2s H 1 2 0.2693692 0.16828 37.5% 548 3s H 3 3 0.2678559 0.21167 21.0% 183 3s H 3 3 0.2579246 0.21167 17.9% 183 3s Cutting planes: Gomory: 1 MIR: 40 Explored 4 nodes (16612 simplex iterations) in 3.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.579246100201e-01, best bound 2.579246100201e-01, gap 0.0%