Build (method = -2) #dp: 767 Step-3' Graph: 59 vertices and 168 arcs (0.00s) Step-4' Graph: 5 vertices and 60 arcs (0.00s) #V4/#V3 = 0.08 #A4/#A3 = 0.36 Ready! (0.00s) Optimize a model with 24 rows, 61 columns and 179 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 22 rows, 59 columns, 175 nonzeros Variable types: 0 continuous, 59 integer (0 binary) Found heuristic solution: objective 1999.0000000 Found heuristic solution: objective 1840.0000000 Optimize a model with 22 rows, 59 columns and 175 nonzeros Presolved: 22 rows, 59 columns, 175 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.000e+01 Factor NZ : 2.530e+02 Factor Ops : 3.795e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.44950077e+03 -5.50334912e+03 2.84e+02 0.00e+00 1.62e+02 0s 1 1.43349088e+03 -1.74003018e+03 1.55e+01 4.44e-16 2.66e+01 0s 2 7.99279724e+02 3.80771140e+02 1.11e-02 3.33e-16 3.07e+00 0s 3 6.71105046e+02 6.01308539e+02 7.97e-05 2.22e-16 5.10e-01 0s 4 6.67058106e+02 6.64822065e+02 4.71e-13 2.22e-16 1.63e-02 0s 5 6.66666983e+02 6.66666621e+02 1.64e-13 2.22e-16 2.64e-06 0s 6 6.66666667e+02 6.66666667e+02 2.52e-13 3.33e-16 2.72e-12 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 6.66666667e+02 Root relaxation: objective 6.666667e+02, 50 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 666.66667 0 4 1840.00000 666.66667 63.8% - 0s H 0 0 667.0000000 666.66667 0.05% - 0s Explored 0 nodes (62 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.670000000000e+02, best bound 6.670000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 667 Solution: 160 x [7, 8, 16] 77 x [1, 7, 11] 4 x [7, 9, 18] 11 x [5, 14, 19] 5 x [2, 3, 19] 79 x [15, 15, 19] 8 x [10, 18, 19] 31 x [10, 17, 19] 3 x [5, 9, 13] 1 x [2, 11, 16] 65 x [2, 3, 12] 1 x [3, 16] 25 x [4, 16, 16] 144 x [6, 12, 14] 45 x [13, 15, 18] 1 x [11, 13, 18] 7 x [4, 13, 18]