Build (method = -2) #dp: 204 Step-3' Graph: 23 vertices and 85 arcs (0.00s) Step-4' Graph: 10 vertices and 59 arcs (0.00s) #V4/#V3 = 0.43 #A4/#A3 = 0.69 Ready! (0.00s) Optimize a model with 44 rows, 60 columns and 164 nonzeros Presolve removed 31 rows and 32 columns Presolve time: 0.00s Presolved: 13 rows, 28 columns, 68 nonzeros Variable types: 0 continuous, 28 integer (4 binary) Found heuristic solution: objective 44.0000000 Found heuristic solution: objective 40.0000000 Found heuristic solution: objective 36.0000000 Optimize a model with 13 rows, 28 columns and 68 nonzeros Presolve removed 1 rows and 1 columns Presolved: 12 rows, 27 columns, 66 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 2.100e+01 Factor NZ : 7.800e+01 Factor Ops : 6.500e+02 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.05979570e+02 -7.63581704e+01 1.00e+01 2.22e-16 6.08e+00 0s 1 4.45230115e+01 4.50896273e+00 1.07e-14 4.44e-16 6.80e-01 0s 2 3.96604784e+01 2.34322480e+01 2.89e-15 8.88e-16 2.75e-01 0s 3 3.57255983e+01 3.25328215e+01 6.66e-15 3.33e-16 5.41e-02 0s 4 3.45341371e+01 3.42506177e+01 7.64e-15 4.44e-16 4.81e-03 0s 5 3.45015529e+01 3.44988469e+01 1.38e-14 2.22e-16 4.59e-05 0s 6 3.45000000e+01 3.45000000e+01 4.00e-15 1.12e-16 7.71e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 3.45000000e+01 Root relaxation: objective 3.450000e+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 34.50000 0 1 36.00000 34.50000 4.17% - 0s H 0 0 35.0000000 34.50000 1.43% - 0s Explored 0 nodes (18 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 35 Solution: 1 x [34] 1 x [33] 1 x [32] 1 x [31] 1 x [30] 2 x [29] 2 x [28] 1 x [27] 3 x [26] 2 x [25] 1 x [24] 1 x [23] 1 x [22] 1 x [21] 1 x [1, 20] 1 x [4, 19] 2 x [5, 18] 2 x [2, 17] 1 x [6, 16] 2 x [7, 15] 2 x [6, 14] 1 x [9, 13] 1 x [10, 12] 1 x [11, 11] 1 x [10] 1 x [3, 8]