Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:58:43 2012 Optimize a model with 789 rows, 124 columns and 1578 nonzeros Presolve removed 316 rows and 0 columns Presolve time: 0.01s Presolved: 473 rows, 124 columns, 1232 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 4.206740e+01, 325 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.06740 0 120 27.00000 42.06740 55.8% - 0s 0 0 41.52052 0 122 27.00000 41.52052 53.8% - 0s H 0 0 30.0000000 41.52052 38.4% - 0s 0 0 40.94528 0 119 30.00000 40.94528 36.5% - 0s 0 0 40.84109 0 122 30.00000 40.84109 36.1% - 0s 0 0 40.70203 0 121 30.00000 40.70203 35.7% - 0s 0 0 40.54670 0 121 30.00000 40.54670 35.2% - 0s 0 0 40.42338 0 122 30.00000 40.42338 34.7% - 0s 0 0 40.36642 0 122 30.00000 40.36642 34.6% - 0s 0 0 40.35198 0 122 30.00000 40.35198 34.5% - 0s 0 0 40.35198 0 121 30.00000 40.35198 34.5% - 0s H 0 0 31.0000000 40.35198 30.2% - 0s 0 2 40.34982 0 121 31.00000 40.34982 30.2% - 0s * 70 43 19 32.0000000 39.93407 24.8% 26.8 0s * 102 39 11 33.0000000 39.45883 19.6% 30.0 0s 626 173 35.61538 7 122 33.00000 37.22449 12.8% 29.5 5s * 2643 98 21 34.0000000 35.27586 3.75% 27.1 8s Cutting planes: Gomory: 1 Clique: 3 Zero half: 44 Explored 2745 nodes (73277 simplex iterations) in 8.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%