Build (method = -2) #dp: 1813 Step-3' Graph: 82 vertices and 256 arcs (0.01s) Step-4' Graph: 18 vertices and 128 arcs (0.01s) #V4/#V3 = 0.22 #A4/#A3 = 0.50 Ready! (0.01s) Optimize a model with 76 rows, 129 columns and 355 nonzeros Presolve removed 35 rows and 42 columns Presolve time: 0.00s Presolved: 41 rows, 87 columns, 230 nonzeros Variable types: 0 continuous, 87 integer (6 binary) Found heuristic solution: objective 101.0000000 Found heuristic solution: objective 81.0000000 Optimize a model with 41 rows, 87 columns and 230 nonzeros Presolved: 41 rows, 87 columns, 230 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.900e+01 Factor NZ : 5.260e+02 Factor Ops : 1.051e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.31871991e+03 -1.21659807e+03 6.57e+01 2.22e-16 4.57e+01 0s 1 3.44466935e+02 -4.98636733e+02 9.63e+00 8.88e-16 7.89e+00 0s 2 9.72205456e+01 -6.50465737e+01 3.40e-01 1.78e-15 8.83e-01 0s 3 7.07690212e+01 2.91778877e+01 8.20e-03 6.83e-16 2.09e-01 0s 4 6.10423266e+01 5.66486696e+01 1.28e-03 2.22e-16 2.20e-02 0s 5 6.00008295e+01 5.99953930e+01 3.75e-06 3.33e-16 2.72e-05 0s 6 6.00000000e+01 6.00000000e+01 3.78e-12 4.44e-16 2.73e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 6.00000000e+01 Root relaxation: objective 6.000000e+01, 42 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 60.0000000 60.00000 0.0% - 0s Explored 0 nodes (42 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 60 Solution: 3 x [17, 58] 2 x [22, 57] 1 x [23, 56] 2 x [11, 55] 1 x [14, 54] 2 x [10, 53] 1 x [11, 52] 1 x [9, 51] 1 x [7, 50] 2 x [31, 49] 5 x [18, 48] 2 x [30, 47] 2 x [9, 46] 1 x [34, 45] 3 x [28, 44] 2 x [4, 43] 4 x [27, 42] 1 x [3, 41] 2 x [2, 40] 3 x [35, 39] 1 x [1, 39] 1 x [5, 38] 1 x [33, 37] 3 x [26, 36] 1 x [8, 32] 1 x [12, 29] 1 x [19, 25] 3 x [19, 24] 2 x [20, 21] 2 x [6, 16] 3 x [13, 15]