Build (method = -2) #dp: 607 Step-3' Graph: 46 vertices and 143 arcs (0.00s) Step-4' Graph: 11 vertices and 73 arcs (0.00s) #V4/#V3 = 0.24 #A4/#A3 = 0.51 Ready! (0.00s) Optimize a model with 47 rows, 74 columns and 205 nonzeros Presolve removed 33 rows and 43 columns Presolve time: 0.00s Presolved: 14 rows, 31 columns, 76 nonzeros Variable types: 0 continuous, 31 integer (4 binary) Found heuristic solution: objective 33.0000000 Found heuristic solution: objective 31.0000000 Optimize a model with 14 rows, 31 columns and 76 nonzeros Presolved: 14 rows, 31 columns, 76 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.500e+01 Factor NZ : 1.050e+02 Factor Ops : 1.015e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.48391650e+02 -1.60292702e+02 1.65e+01 1.11e-16 9.65e+00 0s 1 4.73098737e+01 -2.78032571e+01 9.50e-01 2.78e-16 1.28e+00 0s 2 3.07182537e+01 1.06171002e+01 3.20e-02 2.22e-16 3.01e-01 0s 3 2.57938829e+01 2.14218325e+01 4.29e-03 1.67e-16 6.52e-02 0s 4 2.50106758e+01 2.49399290e+01 3.19e-05 2.22e-16 1.06e-03 0s 5 2.50000019e+01 2.49999992e+01 4.31e-10 3.22e-16 4.07e-08 0s 6 2.50000000e+01 2.50000000e+01 4.88e-15 5.55e-16 4.07e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.50000000e+01 Root relaxation: objective 2.500000e+01, 14 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 25.0000000 25.00000 0.0% - 0s Explored 0 nodes (14 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 25 Solution: 2 x [3, 36] 2 x [13, 35] 1 x [12, 34] 1 x [16, 33] 1 x [15, 32] 1 x [11, 31] 3 x [14, 30] 2 x [1, 29] 1 x [17, 28] 1 x [9, 28] 1 x [8, 27] 1 x [6, 26] 1 x [5, 25] 1 x [2, 24] 2 x [21, 23] 1 x [21, 22] 1 x [4, 20] 1 x [7, 19] 1 x [10, 18]