current bounds on the number of colors: 0 -- 150 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:47:20 2012 Optimize a model with 45450 rows, 11854 columns and 147150 nonzeros Presolve time: 0.16s Presolved: 45450 rows, 11854 columns, 147150 nonzeros Variable types: 0 continuous, 11854 integer (11854 binary) Root relaxation: objective 0.000000e+00, 555 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 (879 simplex iterations) in 0.26 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 18:47:21 2012 Optimize a model with 22498 rows, 6154 columns and 72594 nonzeros Presolve time: 0.11s Presolved: 22498 rows, 6154 columns, 72594 nonzeros Variable types: 0 continuous, 6154 integer (6154 binary) Root relaxation: objective 0.000000e+00, 392 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 (676 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 18:47:21 2012 Optimize a model with 11022 rows, 3304 columns and 35316 nonzeros Presolve time: 0.04s Presolved: 11022 rows, 3304 columns, 35316 nonzeros Variable types: 0 continuous, 3304 integer (3304 binary) Root relaxation: objective 0.000000e+00, 306 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 (573 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 18:47:21 2012 Optimize a model with 5586 rows, 1954 columns and 17658 nonzeros Presolve time: 0.02s Presolved: 5586 rows, 1954 columns, 17658 nonzeros Variable types: 0 continuous, 1954 integer (1954 binary) Root relaxation: objective 0.000000e+00, 314 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 (577 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 18:47:22 2012 Optimize a model with 2566 rows, 1204 columns and 7848 nonzeros Presolve time: 0.01s Presolved: 2566 rows, 1204 columns, 7848 nonzeros Variable types: 0 continuous, 1204 integer (1204 binary) Root relaxation: objective 0.000000e+00, 364 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 0 276 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 277 - 0.00000 - - 0s 0 0 0.00000 0 327 - 0.00000 - - 0s 0 0 0.00000 0 224 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 1s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 208 - 0.00000 - - 1s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 0 0.00000 0 210 - 0.00000 - - 2s 0 0 0.00000 0 300 - 0.00000 - - 2s 0 0 0.00000 0 300 - 0.00000 - - 2s 0 2 0.00000 0 300 - 0.00000 - - 2s 620 70 0.00000 12 236 - 0.00000 - 84.9 5s 812 93 0.00000 22 304 - 0.00000 - 82.0 10s 820 99 infeasible 15 - 0.00000 - 126 15s * 1107 0 27 0.0000000 0.00000 0.0% 129 17s Cutting planes: Gomory: 1 Zero half: 21 Explored 1108 nodes (172696 simplex iterations) in 17.32 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 18:47:39 2012 Optimize a model with 1358 rows, 904 columns and 3924 nonzeros Presolve removed 150 rows and 150 columns Presolve time: 0.00s Presolved: 1208 rows, 754 columns, 3624 nonzeros Variable types: 0 continuous, 754 integer (754 binary) Root relaxation: objective 0.000000e+00, 162 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 0 150 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (657 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 18:47:39 2012 Optimize a model with 1962 rows, 1054 columns and 5886 nonzeros Presolve time: 0.00s Presolved: 1962 rows, 1054 columns, 5886 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Root relaxation: objective 0.000000e+00, 369 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 0 296 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3301 simplex iterations) in 0.32 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