Build (method = -2) #dp: 2539 Step-3' Graph: 90 vertices and 392 arcs (0.01s) Step-4' Graph: 43 vertices and 298 arcs (0.01s) #V4/#V3 = 0.48 #A4/#A3 = 0.76 Ready! (0.01s) Optimize a model with 82 rows, 299 columns and 815 nonzeros Presolve removed 16 rows and 16 columns Presolve time: 0.00s Presolved: 66 rows, 283 columns, 770 nonzeros Variable types: 0 continuous, 283 integer (164 binary) Found heuristic solution: objective 27.0000000 Optimize a model with 66 rows, 283 columns and 770 nonzeros Presolved: 66 rows, 283 columns, 770 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.870e+02 Factor NZ : 1.245e+03 Factor Ops : 2.745e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.25419802e+02 -2.25730755e+03 8.69e+02 1.73e-01 2.52e+01 0s 1 2.39895072e+02 -5.27936801e+02 1.50e+02 6.66e-16 4.21e+00 0s 2 5.33600346e+01 -1.52849758e+02 1.00e+01 5.55e-16 5.20e-01 0s 3 2.93828719e+01 -1.38385549e+01 8.00e-14 4.44e-16 7.54e-02 0s 4 2.05788346e+01 3.81188935e+00 4.30e-12 9.68e-16 2.93e-02 0s 5 1.81006078e+01 1.12741783e+01 1.40e-12 8.88e-16 1.19e-02 0s 6 1.69871528e+01 1.56981620e+01 5.31e-13 4.44e-16 2.25e-03 0s 7 1.66707557e+01 1.65985340e+01 1.35e-13 3.72e-16 1.26e-04 0s 8 1.66666708e+01 1.66665986e+01 3.74e-14 9.99e-16 1.26e-07 0s 9 1.66666667e+01 1.66666667e+01 1.24e-14 5.06e-16 1.26e-13 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 1.66666667e+01 Root relaxation: objective 1.666667e+01, 187 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 16 27.00000 16.66667 38.3% - 0s H 0 0 17.0000000 16.66667 1.96% - 0s Explored 0 nodes (251 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: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 17 Solution: 1 x [5, 5, 39] 1 x [3, 20, 38] 1 x [7, 18, 38] 1 x [2, 21, 37] 1 x [5, 18, 36] 1 x [11, 15, 35] 1 x [9, 22, 34] 1 x [8, 22, 33] 1 x [13, 17, 32] 1 x [12, 32] 1 x [6, 26, 31] 1 x [4, 16, 30] 1 x [2, 19, 29] 1 x [1, 27, 28] 1 x [2, 23, 25] 1 x [4, 10, 24] 1 x [14, 14, 23]