current bounds on the number of colors: 0 -- 153 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:22 2012 Optimize a model with 47121 rows, 12246 columns and 152532 nonzeros Presolve time: 0.16s Presolved: 47121 rows, 12246 columns, 152532 nonzeros Variable types: 0 continuous, 12246 integer (12246 binary) Root relaxation: objective 0.000000e+00, 561 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (994 simplex iterations) in 0.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:22 2012 Optimize a model with 23637 rows, 6432 columns and 76266 nonzeros Presolve time: 0.12s Presolved: 23637 rows, 6432 columns, 76266 nonzeros Variable types: 0 continuous, 6432 integer (6432 binary) Root relaxation: objective 0.000000e+00, 399 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (699 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:23 2012 Optimize a model with 11895 rows, 3525 columns and 38133 nonzeros Presolve time: 0.04s Presolved: 11895 rows, 3525 columns, 38133 nonzeros Variable types: 0 continuous, 3525 integer (3525 binary) Root relaxation: objective 0.000000e+00, 329 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (612 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:23 2012 Optimize a model with 5715 rows, 1995 columns and 18063 nonzeros Presolve time: 0.02s Presolved: 5715 rows, 1995 columns, 18063 nonzeros Variable types: 0 continuous, 1995 integer (1995 binary) Root relaxation: objective 0.000000e+00, 330 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (592 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:23 2012 Optimize a model with 2625 rows, 1230 columns and 8028 nonzeros Presolve time: 0.01s Presolved: 2625 rows, 1230 columns, 8028 nonzeros Variable types: 0 continuous, 1230 integer (1230 binary) Root relaxation: objective 0.000000e+00, 351 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 371 - 0.00000 - - 0s 0 0 0.00000 0 378 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 1s 0 0 0.00000 0 330 - 0.00000 - - 1s 0 0 0.00000 0 182 - 0.00000 - - 1s 0 0 0.00000 0 188 - 0.00000 - - 2s 0 0 0.00000 0 176 - 0.00000 - - 2s 0 0 0.00000 0 220 - 0.00000 - - 2s 0 0 0.00000 0 220 - 0.00000 - - 2s 0 2 0.00000 0 220 - 0.00000 - - 3s 659 43 0.00000 21 231 - 0.00000 - 64.4 5s 1053 30 infeasible 26 - 0.00000 - 89.7 10s * 1111 1 29 0.0000000 0.00000 0.0% 91.5 10s Cutting planes: Gomory: 3 Zero half: 10 Explored 1112 nodes (126125 simplex iterations) in 10.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:34 2012 Optimize a model with 1389 rows, 924 columns and 4014 nonzeros Presolve removed 153 rows and 153 columns Presolve time: 0.00s Presolved: 1236 rows, 771 columns, 3708 nonzeros Variable types: 0 continuous, 771 integer (771 binary) Root relaxation: objective 0.000000e+00, 160 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 153 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (655 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:51:34 2012 Optimize a model with 2007 rows, 1077 columns and 6021 nonzeros Presolve time: 0.00s Presolved: 2007 rows, 1077 columns, 6021 nonzeros Variable types: 0 continuous, 1077 integer (1077 binary) Root relaxation: objective 0.000000e+00, 356 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (6224 simplex iterations) in 0.49 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4