Build (method = -2) #dp: 1069 Step-3' Graph: 32 vertices and 177 arcs (0.01s) Step-4' Graph: 5 vertices and 123 arcs (0.01s) #V4/#V3 = 0.16 #A4/#A3 = 0.69 Ready! (0.01s) Optimize a model with 45 rows, 124 columns and 368 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.00s Presolved: 43 rows, 122 columns, 364 nonzeros Variable types: 0 continuous, 122 integer (6 binary) Found heuristic solution: objective 213.0000000 Found heuristic solution: objective 209.0000000 Optimize a model with 43 rows, 122 columns and 364 nonzeros Presolved: 43 rows, 122 columns, 364 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.230e+02 Factor NZ : 5.720e+02 Factor Ops : 1.162e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.88978447e+02 -6.06900207e+02 3.73e+01 1.03e-02 1.23e+01 0s 1 1.49950693e+02 -2.74528123e+02 6.89e-13 3.33e-16 1.57e+00 0s 2 9.86261962e+01 -1.60787481e+01 4.80e-14 1.94e-16 4.13e-01 0s 3 7.35237697e+01 6.33488814e+01 5.99e-14 3.33e-16 3.61e-02 0s 4 7.20609834e+01 7.14588532e+01 4.60e-14 2.22e-16 2.14e-03 0s 5 7.20000012e+01 7.19999920e+01 2.22e-13 1.11e-16 3.26e-08 0s 6 7.20000000e+01 7.20000000e+01 2.10e-14 1.11e-16 3.26e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 7.20000000e+01 Root relaxation: objective 7.200000e+01, 100 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 72.0000000 72.00000 0.0% - 0s Explored 0 nodes (100 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 7.200000000000e+01, best bound 7.200000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 72 Solution: 4 x [10, 19, 22] 1 x [2, 10, 15] 6 x [9, 23, 40] 3 x [2, 33, 38] 1 x [8, 14, 33] 3 x [5, 14, 27] 6 x [7, 12, 18] 7 x [8, 29, 32] 6 x [1, 3, 17] 1 x [22, 27, 29] 1 x [9, 25, 26] 3 x [6, 16, 26] 6 x [16, 21, 30] 8 x [13, 15, 36] 1 x [13, 18, 28] 2 x [20, 28, 35] 3 x [18, 34, 37] 7 x [11, 24, 39] 1 x [4, 11, 40] 1 x [4, 20, 34] 1 x [4, 15, 31]