Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:42 2012 Optimize a model with 245 rows, 67 columns and 490 nonzeros Presolve removed 94 rows and 5 columns Presolve time: 0.00s Presolved: 151 rows, 62 columns, 351 nonzeros Variable types: 0 continuous, 62 integer (62 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.633333e+01, 85 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 26.33333 0 55 22.00000 26.33333 19.7% - 0s H 0 0 24.0000000 26.33333 9.72% - 0s 0 0 25.84084 0 59 24.00000 25.84084 7.67% - 0s 0 0 25.71111 0 58 24.00000 25.71111 7.13% - 0s 0 0 25.57143 0 59 24.00000 25.57143 6.55% - 0s 0 0 25.49042 0 61 24.00000 25.49042 6.21% - 0s 0 0 25.30769 0 59 24.00000 25.30769 5.45% - 0s 0 0 25.21569 0 57 24.00000 25.21569 5.07% - 0s 0 0 25.13333 0 57 24.00000 25.13333 4.72% - 0s 0 0 25.05714 0 58 24.00000 25.05714 4.40% - 0s 0 0 25.00000 0 32 24.00000 25.00000 4.17% - 0s 0 0 cutoff 0 24.00000 24.99997 4.17% - 0s Cutting planes: Clique: 3 Zero half: 26 Explored 0 nodes (321 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%