Build (method = -2) #dp: 130321 Step-3' Graph: 671 vertices and 14167 arcs (1.12s) Step-4' Graph: 428 vertices and 13681 arcs (1.13s) #V4/#V3 = 0.64 #A4/#A3 = 0.97 Ready! (1.13s) Optimize a model with 582 rows, 13682 columns and 40194 nonzeros Presolve removed 18 rows and 30 columns Presolve time: 0.19s Presolved: 564 rows, 13652 columns, 40186 nonzeros Variable types: 0 continuous, 13652 integer (10253 binary) Found heuristic solution: objective 91.0000000 Optimize a model with 564 rows, 13652 columns and 40186 nonzeros Presolved: 564 rows, 13652 columns, 40186 nonzeros Root barrier log... Ordering time: 0.01s Barrier statistics: AA' NZ : 2.680e+04 Factor NZ : 5.957e+04 (roughly 6 MBytes of memory) Factor Ops : 9.513e+06 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.48179709e+04 -2.68593752e+05 2.88e+05 2.45e-01 9.13e+01 0s 1 7.48125588e+03 -2.31226469e+04 5.68e+04 6.66e-16 1.67e+01 0s 2 1.07082338e+03 -7.27391766e+03 3.72e+03 1.11e-15 1.30e+00 0s 3 3.80898823e+02 -2.64781249e+03 2.33e+02 8.88e-16 1.67e-01 0s 4 1.68821920e+02 -5.24534785e+02 4.42e+01 6.66e-16 3.57e-02 0s 5 9.26776369e+01 -2.03895002e+02 1.41e+01 3.96e-16 1.37e-02 0s 6 7.51732576e+01 -9.12825049e+01 8.87e+00 4.44e-16 7.64e-03 0s 7 5.62882938e+01 -1.59919724e+01 3.67e+00 3.33e-16 3.16e-03 0s 8 5.35507010e+01 1.38035853e+01 2.29e+00 3.54e-16 1.68e-03 0s 9 5.25546186e+01 3.40957343e+01 1.76e+00 4.44e-16 7.79e-04 0s 10 5.16798707e+01 4.64525308e+01 9.59e-01 3.33e-16 2.15e-04 0s 11 5.00270490e+01 4.97605041e+01 2.73e-04 4.44e-16 9.75e-06 0s 12 5.00001410e+01 4.99994578e+01 3.45e-07 4.44e-16 2.50e-08 0s 13 5.00000000e+01 5.00000000e+01 4.51e-12 3.56e-16 5.17e-14 0s Barrier solved model in 13 iterations and 0.20 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 11872 iterations, 0.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (13031 simplex iterations) in 0.88 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 1.18 seconds Gurobi run time: 0.88 seconds Total run time: 2.06 seconds Objective: 50 Solution: 1 x [37, 65, 135, 154] 1 x [18, 85, 99, 153] 1 x [54, 82, 99, 152] 1 x [23, 65, 76, 152] 1 x [41, 68, 69, 152] 1 x [1, 60, 112, 151] 1 x [33, 44, 50, 151] 1 x [7, 93, 142, 150] 1 x [38, 60, 77, 150] 1 x [10, 81, 103, 149] 2 x [22, 59, 62, 148] 1 x [35, 71, 131, 147] 1 x [12, 69, 78, 146] 1 x [11, 88, 96, 145] 1 x [6, 86, 91, 144] 1 x [43, 83, 121, 143] 1 x [15, 84, 138, 141] 1 x [26, 105, 122, 140] 1 x [18, 90, 124, 139] 1 x [27, 33, 74, 139] 1 x [13, 108, 125, 137] 1 x [49, 80, 131, 136] 1 x [2, 112, 113, 136] 1 x [20, 56, 129, 134] 1 x [3, 126, 127, 133] 1 x [17, 94, 123, 133] 1 x [19, 56, 128, 132] 1 x [13, 109, 120, 131] 1 x [53, 95, 101, 130] 2 x [48, 104, 115, 119] 1 x [9, 51, 70, 118] 1 x [4, 87, 92, 117] 1 x [24, 62, 99, 116] 1 x [8, 90, 110, 114] 1 x [4, 94, 98, 111] 1 x [41, 46, 75, 107] 1 x [34, 52, 73, 106] 1 x [4, 97, 100, 105] 1 x [30, 39, 67, 102] 1 x [9, 28, 79, 93] 1 x [32, 47, 63, 89] 1 x [25, 46, 66, 72] 1 x [5, 29, 55, 64] 3 x [14, 21, 40, 64] 1 x [16, 36, 42, 61] 1 x [31, 45, 57, 58]