Build (method = -2) #dp: 6257 Step-3' Graph: 97 vertices and 280 arcs (0.03s) Step-4' Graph: 7 vertices and 100 arcs (0.03s) #V4/#V3 = 0.07 #A4/#A3 = 0.36 Ready! (0.03s) Optimize a model with 26 rows, 101 columns and 297 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 24 rows, 99 columns, 293 nonzeros Variable types: 0 continuous, 99 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1829.0000000 Optimize a model with 24 rows, 99 columns and 293 nonzeros Presolved: 24 rows, 99 columns, 293 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.020e+02 Factor NZ : 3.000e+02 Factor Ops : 4.900e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.94325450e+03 -1.27801890e+04 9.69e+02 1.11e-16 2.78e+02 0s 1 1.58347454e+03 -5.53033371e+03 4.17e+01 5.55e-16 3.97e+01 0s 2 8.36047998e+02 -9.12814498e+01 1.99e-02 7.77e-16 4.34e+00 0s 3 4.18558246e+02 2.13444339e+02 8.58e-04 2.22e-16 9.46e-01 0s 4 4.01432030e+02 3.93232837e+02 6.19e-05 1.19e-16 3.78e-02 0s 5 4.00000239e+02 3.99998274e+02 2.36e-13 3.33e-16 9.06e-06 0s 6 4.00000000e+02 4.00000000e+02 2.12e-13 2.41e-16 9.06e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 4.00000000e+02 Root relaxation: objective 4.000000e+02, 88 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 400.0000000 400.00000 0.0% - 0s Explored 0 nodes (88 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+02, best bound 4.000000000000e+02, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.00 seconds Total run time: 0.04 seconds Objective: 400 Solution: 37 x [4, 9, 10, 17, 19] 1 x [11, 12, 13, 15, 19] 130 x [10, 11, 15, 18, 19] 3 x [3, 6, 6, 6, 19] 54 x [4, 5, 10, 14, 16] 5 x [4, 6, 7, 12, 15] 1 x [3, 6, 10, 13, 16] 32 x [3, 8, 11, 12, 13] 22 x [2, 6, 7, 12, 14] 7 x [2, 6, 6, 10, 15] 15 x [1, 6, 6, 13, 17] 92 x [6, 7, 8, 12, 13] 1 x [6, 6, 6, 7, 15]