Build (method = -2) #dp: 9422 Step-3' Graph: 332 vertices and 987 arcs (0.08s) Step-4' Graph: 95 vertices and 513 arcs (0.09s) #V4/#V3 = 0.29 #A4/#A3 = 0.52 Ready! (0.09s) Optimize a model with 143 rows, 514 columns and 1358 nonzeros Presolve removed 30 rows and 59 columns Presolve time: 0.01s Presolved: 113 rows, 455 columns, 1246 nonzeros Variable types: 0 continuous, 455 integer (75 binary) Found heuristic solution: objective 102.0000000 Found heuristic solution: objective 71.0000000 Optimize a model with 113 rows, 455 columns and 1246 nonzeros Presolved: 113 rows, 455 columns, 1246 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.490e+02 Factor NZ : 1.076e+03 Factor Ops : 1.408e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.29080401e+02 -1.15702381e+03 5.78e+02 8.70e-02 7.06e+00 0s 1 1.54074427e+02 -5.37549885e+02 4.06e+01 9.99e-16 1.04e+00 0s 2 6.54887801e+01 -9.30746889e+01 3.61e-01 5.55e-16 1.71e-01 0s 3 2.97582521e+01 -4.88991122e+00 3.96e-02 4.44e-16 3.69e-02 0s 4 2.45394244e+01 2.19431828e+01 4.69e-14 6.99e-16 2.75e-03 0s 5 2.40042212e+01 2.39942584e+01 4.14e-14 4.22e-16 1.06e-05 0s 6 2.40000000e+01 2.40000000e+01 1.82e-13 4.01e-16 1.24e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.40000000e+01 Root relaxation: objective 2.400000e+01, 322 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 (371 simplex iterations) in 0.02 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: 0.10 seconds Gurobi run time: 0.02 seconds Total run time: 0.12 seconds Objective: 24 Solution: 1 x [12, 26, 37, 46, 48] 4 x [2, 34, 41, 42, 48] 1 x [18, 31, 45, 45, 47] 1 x [3, 5, 10, 44, 46] 1 x [4, 6, 20, 40, 44] 1 x [6, 9, 25, 31, 44] 1 x [7, 12, 24, 27, 43] 1 x [6, 11, 12, 17, 41] 2 x [8, 14, 16, 32, 40] 2 x [8, 15, 16, 21, 39] 1 x [13, 13, 13, 23, 38] 3 x [1, 11, 15, 22, 36] 1 x [7, 29, 33, 33, 35] 2 x [7, 17, 18, 19, 31] 1 x [6, 12, 14, 23, 30] 1 x [6, 9, 26, 28, 29]