Build (method = -2) #dp: 9185 Step-3' Graph: 330 vertices and 982 arcs (0.10s) Step-4' Graph: 99 vertices and 520 arcs (0.10s) #V4/#V3 = 0.30 #A4/#A3 = 0.53 Ready! (0.10s) Optimize a model with 147 rows, 521 columns and 1370 nonzeros Presolve removed 26 rows and 50 columns Presolve time: 0.01s Presolved: 121 rows, 471 columns, 1272 nonzeros Variable types: 0 continuous, 471 integer (60 binary) Found heuristic solution: objective 95.0000000 Found heuristic solution: objective 62.0000000 Optimize a model with 121 rows, 471 columns and 1272 nonzeros Presolved: 121 rows, 471 columns, 1272 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.830e+02 Factor NZ : 1.093e+03 Factor Ops : 1.254e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.48725725e+02 -1.24222735e+03 6.82e+02 1.06e-01 7.00e+00 0s 1 1.54336793e+02 -5.41355368e+02 4.31e+01 4.44e-16 9.86e-01 0s 2 7.13865016e+01 -1.06717813e+02 1.83e+00 2.22e-16 1.88e-01 0s 3 2.91604597e+01 -2.64416025e+00 1.16e-01 2.22e-16 3.27e-02 0s 4 2.46969551e+01 2.26485583e+01 3.06e-03 4.44e-16 2.10e-03 0s 5 2.40018444e+01 2.39962970e+01 4.89e-06 2.22e-16 5.68e-06 0s 6 2.40000000e+01 2.40000000e+01 5.01e-12 1.56e-16 5.84e-12 0s Barrier solved model in 6 iterations and 0.01 seconds Optimal objective 2.40000000e+01 Root relaxation: objective 2.400000e+01, 324 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 24.0000000 24.00000 0.0% - 0s Explored 0 nodes (324 simplex iterations) in 0.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0% Preprocessing time: 0.11 seconds Gurobi run time: 0.03 seconds Total run time: 0.14 seconds Objective: 24 Solution: 1 x [9, 32, 38, 46, 48] 1 x [18, 26, 45, 45, 47] 1 x [26, 34, 39, 42, 47] 3 x [16, 20, 37, 39, 47] 2 x [2, 13, 21, 22, 44] 4 x [19, 21, 35, 42, 43] 1 x [7, 14, 24, 37, 43] 3 x [4, 15, 23, 31, 41] 2 x [1, 5, 27, 30, 40] 3 x [10, 12, 24, 33, 36] 1 x [4, 11, 18, 21, 35] 1 x [3, 6, 8, 25, 34] 1 x [17, 17, 28, 28, 29]