current bounds on the number of colors: 0 -- 151 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:18 2012 Optimize a model with 46201 rows, 11939 columns and 149475 nonzeros Presolve time: 0.16s Presolved: 46201 rows, 11939 columns, 149475 nonzeros Variable types: 0 continuous, 11939 integer (11939 binary) Root relaxation: objective 0.000000e+00, 535 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 (871 simplex iterations) in 0.28 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 -- 75 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:18 2012 Optimize a model with 22869 rows, 6201 columns and 73741 nonzeros Presolve time: 0.12s Presolved: 22869 rows, 6201 columns, 73741 nonzeros Variable types: 0 continuous, 6201 integer (6201 binary) Root relaxation: objective 0.000000e+00, 371 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 (657 simplex iterations) in 0.16 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 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:19 2012 Optimize a model with 11203 rows, 3332 columns and 35874 nonzeros Presolve time: 0.04s Presolved: 11203 rows, 3332 columns, 35874 nonzeros Variable types: 0 continuous, 3332 integer (3332 binary) Root relaxation: objective 0.000000e+00, 317 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 (588 simplex iterations) in 0.06 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:48:19 2012 Optimize a model with 5677 rows, 1973 columns and 17937 nonzeros Presolve time: 0.02s Presolved: 5677 rows, 1973 columns, 17937 nonzeros Variable types: 0 continuous, 1973 integer (1973 binary) Root relaxation: objective 0.000000e+00, 321 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 (583 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 18:48:19 2012 Optimize a model with 2607 rows, 1218 columns and 7972 nonzeros Presolve time: 0.01s Presolved: 2607 rows, 1218 columns, 7972 nonzeros Variable types: 0 continuous, 1218 integer (1218 binary) Root relaxation: objective 0.000000e+00, 376 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 1s 0 0 0.00000 0 346 - 0.00000 - - 1s 0 0 0.00000 0 255 - 0.00000 - - 1s 0 2 0.00000 0 255 - 0.00000 - - 1s 1103 60 0.00000 6 278 - 0.00000 - 70.1 5s 1109 64 0.00000 10 275 - 0.00000 - 69.7 10s 1380 16 infeasible 26 - 0.00000 - 106 15s 1994 4 infeasible 24 - 0.00000 - 122 20s * 2157 0 24 0.0000000 0.00000 0.0% 125 21s Cutting planes: Clique: 1 Zero half: 25 Explored 2158 nodes (288161 simplex iterations) in 21.39 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 18:48:41 2012 Optimize a model with 1379 rows, 916 columns and 3986 nonzeros Presolve removed 151 rows and 151 columns Presolve time: 0.00s Presolved: 1228 rows, 765 columns, 3684 nonzeros Variable types: 0 continuous, 765 integer (765 binary) Root relaxation: objective 0.000000e+00, 161 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 0 151 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (641 simplex iterations) in 0.02 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 18:48:41 2012 Optimize a model with 1993 rows, 1067 columns and 5979 nonzeros Presolve time: 0.01s Presolved: 1993 rows, 1067 columns, 5979 nonzeros Variable types: 0 continuous, 1067 integer (1067 binary) Root relaxation: objective 0.000000e+00, 384 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 0 292 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3605 simplex iterations) in 0.34 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