Build (method = -2) #dp: 7193 Step-3' Graph: 115 vertices and 334 arcs (0.03s) Step-4' Graph: 23 vertices and 150 arcs (0.03s) #V4/#V3 = 0.20 #A4/#A3 = 0.45 Ready! (0.03s) Optimize a model with 43 rows, 151 columns and 415 nonzeros Presolve removed 10 rows and 18 columns Presolve time: 0.00s Presolved: 33 rows, 133 columns, 382 nonzeros Variable types: 0 continuous, 133 integer (5 binary) Found heuristic solution: objective 197.0000000 Found heuristic solution: objective 107.0000000 Optimize a model with 33 rows, 133 columns and 382 nonzeros Presolved: 33 rows, 133 columns, 382 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.480e+02 Factor NZ : 3.640e+02 Factor Ops : 5.364e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.64090367e+02 -1.23073448e+03 4.10e+02 5.81e-02 3.34e+01 0s 1 2.14874200e+02 -6.70262165e+02 3.01e+01 5.55e-16 4.73e+00 0s 2 9.02838647e+01 -6.68274376e+01 1.56e-03 6.66e-16 5.55e-01 0s 3 4.50156637e+01 2.28816806e+01 1.26e-04 2.22e-16 7.77e-02 0s 4 4.08040579e+01 3.88857709e+01 1.92e-05 3.97e-16 6.73e-03 0s 5 4.00088782e+01 3.99762085e+01 9.55e-08 2.22e-16 1.15e-04 0s 6 4.00000001e+01 3.99999999e+01 1.54e-12 2.22e-16 8.40e-10 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 4.00000001e+01 Root relaxation: objective 4.000000e+01, 112 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 40.0000000 40.00000 0.0% - 0s Explored 0 nodes (112 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.00 seconds Total run time: 0.05 seconds Objective: 40 Solution: 2 x [3, 8, 13, 17, 20] 3 x [4, 6, 15, 16, 19] 13 x [1, 6, 7, 14, 19] 10 x [3, 5, 9, 10, 12] 7 x [5, 11, 12, 17, 20] 1 x [1, 5, 7, 9, 16] 1 x [1, 2, 5, 15, 17] 2 x [1, 2, 12, 17, 17] 1 x [4, 11, 17, 17, 18]