Gurobi 5.6.3 (linux64) logging started Tue Oct 7 23:06:02 2014 Optimize a model with 36047 rows, 18091 columns and 89780 nonzeros Presolve removed 134 rows and 0 columns Presolve time: 0.46s Presolved: 35913 rows, 18091 columns, 89646 nonzeros Variable types: 1 continuous, 18090 integer (18090 binary) Found heuristic solution: objective 1.1269395 Found heuristic solution: objective 1.1100276 Found heuristic solution: objective 1.0890961 Root relaxation: objective 2.480336e-03, 27521 iterations, 4.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00248 0 17729 1.08910 0.00248 100% - 8s H 0 0 0.1723525 0.00248 98.6% - 18s 0 0 infeasible 0 0.17235 0.17235 0.00% - 31s Cutting planes: Gomory: 1 Explored 0 nodes (60566 simplex iterations) in 31.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.723524722901e-01, best bound 1.723524722901e-01, gap 0.0%