Build (method = -2) #dp: 6141 Step-3' Graph: 133 vertices and 391 arcs (0.03s) Step-4' Graph: 11 vertices and 147 arcs (0.03s) #V4/#V3 = 0.08 #A4/#A3 = 0.38 Ready! (0.03s) Optimize a model with 54 rows, 148 columns and 427 nonzeros Presolve removed 4 rows and 4 columns Presolve time: 0.00s Presolved: 50 rows, 144 columns, 417 nonzeros Variable types: 0 continuous, 144 integer (103 binary) Found heuristic solution: objective 20.0000000 Optimize a model with 50 rows, 144 columns and 417 nonzeros Presolved: 50 rows, 144 columns, 417 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.500e+02 Factor NZ : 6.060e+02 Factor Ops : 1.178e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.18459796e+02 -1.07089845e+02 1.07e+01 1.52e-02 1.30e+00 0s 1 2.72844370e+01 -2.18482204e+01 3.02e-14 2.22e-16 1.79e-01 0s 2 1.79740380e+01 1.30488212e+01 2.38e-14 5.18e-03 1.73e-02 0s 3 1.66752103e+01 1.66496002e+01 2.55e-14 1.14e-16 8.68e-05 0s 4 1.66666752e+01 1.66666496e+01 5.90e-14 2.22e-16 8.68e-08 0s 5 1.66666667e+01 1.66666667e+01 1.98e-14 1.11e-16 8.68e-14 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 95 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.66667 0 4 20.00000 16.66667 16.7% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (128 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0% Preprocessing time: 0.04 seconds Gurobi run time: 0.01 seconds Total run time: 0.04 seconds Objective: 17 Solution: 1 x [1, 18, 32] 1 x [29, 43] 1 x [21, 39, 41] 1 x [12, 14, 19] 1 x [16, 16, 34] 1 x [4, 9, 15] 1 x [5, 25, 38] 1 x [3, 11, 40] 2 x [17, 30, 36] 1 x [10, 37, 42] 1 x [6, 33, 35] 1 x [2, 28, 31] 1 x [7, 7, 39] 1 x [21, 26, 27] 1 x [13, 23, 24] 1 x [8, 20, 22]