Build (method = -2) #dp: 25159 Step-3' Graph: 522 vertices and 1571 arcs (0.22s) Step-4' Graph: 205 vertices and 937 arcs (0.22s) #V4/#V3 = 0.39 #A4/#A3 = 0.60 Ready! (0.22s) Optimize a model with 259 rows, 938 columns and 2411 nonzeros Presolve removed 69 rows and 138 columns Presolve time: 0.01s Presolved: 190 rows, 800 columns, 2152 nonzeros Variable types: 0 continuous, 800 integer (24 binary) Found heuristic solution: objective 189.0000000 Found heuristic solution: objective 159.0000000 Optimize a model with 190 rows, 800 columns and 2152 nonzeros Presolved: 190 rows, 800 columns, 2152 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.034e+03 Factor NZ : 2.167e+03 Factor Ops : 2.813e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.48760420e+03 -3.63322429e+03 2.81e+03 1.31e-01 1.84e+01 0s 1 4.35923309e+02 -1.89693894e+03 3.22e+02 4.44e-16 2.97e+00 0s 2 1.55981676e+02 -5.38977159e+02 1.38e+00 5.55e-16 4.26e-01 0s 3 8.47029896e+01 -5.68511196e+01 7.21e-02 3.47e-16 8.59e-02 0s 4 3.86949639e+01 1.32975585e+00 1.26e-02 3.33e-16 2.27e-02 0s 5 3.61810370e+01 2.40750982e+01 5.56e-03 3.17e-16 7.34e-03 0s 6 3.36362194e+01 3.26907277e+01 1.11e-04 4.44e-16 5.73e-04 0s 7 3.33334730e+01 3.33323782e+01 6.37e-08 3.33e-16 6.64e-07 0s 8 3.33333335e+01 3.33333324e+01 2.27e-13 2.31e-16 6.64e-10 0s 9 3.33333333e+01 3.33333333e+01 4.43e-14 2.34e-16 7.18e-16 0s Barrier solved model in 9 iterations and 0.01 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 550 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.33333 0 8 159.00000 33.33333 79.0% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (702 simplex iterations) in 0.04 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.23 seconds Gurobi run time: 0.04 seconds Total run time: 0.27 seconds Objective: 34 Solution: 5 x [4, 19, 29, 30, 32, 40] 1 x [38, 39, 39, 39, 39, 44] 1 x [37, 37, 38, 44] 1 x [3, 12, 36, 37, 37, 44] 2 x [9, 11, 26, 28, 36, 54] 1 x [11, 27, 33, 33, 35, 44] 3 x [2, 8, 35, 41, 43, 46] 1 x [3, 34, 34, 43, 47] 1 x [1, 27, 33, 33, 44, 49] 4 x [5, 9, 10, 31, 48, 49] 4 x [1, 16, 18, 23, 25, 53] 2 x [12, 22, 24, 45, 46, 49] 1 x [16, 17, 19, 21, 42, 42] 4 x [5, 6, 7, 13, 20, 50] 1 x [15, 15, 41, 43, 52, 54] 1 x [5, 7, 14, 14, 43, 51] 1 x [3, 4, 43, 44, 47]