current bounds on the number of colors: 0 -- 91 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:56 2012 Optimize a model with 9091 rows, 4295 columns and 31095 nonzeros Presolve removed 2 rows and 90 columns Presolve time: 0.06s Presolved: 9089 rows, 4205 columns, 31005 nonzeros Variable types: 0 continuous, 4205 integer (4205 binary) Root relaxation: objective 0.000000e+00, 227 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 (366 simplex iterations) in 0.08 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 -- 45 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:56 2012 Optimize a model with 4491 rows, 2202 columns and 15202 nonzeros Presolve removed 2 rows and 44 columns Presolve time: 0.02s Presolved: 4489 rows, 2158 columns, 15158 nonzeros Variable types: 0 continuous, 2158 integer (2158 binary) Root relaxation: objective 0.000000e+00, 192 iterations, 0.00 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 (325 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:57 2012 Optimize a model with 2291 rows, 1201 columns and 7601 nonzeros Presolve removed 2 rows and 22 columns Presolve time: 0.01s Presolved: 2289 rows, 1179 columns, 7579 nonzeros Variable types: 0 continuous, 1179 integer (1179 binary) Root relaxation: objective 0.000000e+00, 202 iterations, 0.00 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 (330 simplex iterations) in 0.01 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:57 2012 Optimize a model with 1091 rows, 655 columns and 3455 nonzeros Presolve removed 2 rows and 10 columns Presolve time: 0.00s Presolved: 1089 rows, 645 columns, 3445 nonzeros Variable types: 0 continuous, 645 integer (645 binary) Root relaxation: objective 0.000000e+00, 211 iterations, 0.00 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 (364 simplex iterations) in 0.01 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:57 2012 Optimize a model with 491 rows, 382 columns and 1382 nonzeros Presolve removed 91 rows and 93 columns Presolve time: 0.00s Presolved: 400 rows, 289 columns, 1200 nonzeros Variable types: 0 continuous, 289 integer (289 binary) Root relaxation: objective 0.000000e+00, 97 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 89 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (344 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:57 2012 Optimize a model with 691 rows, 473 columns and 2073 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 689 rows, 467 columns, 2067 nonzeros Variable types: 0 continuous, 467 integer (467 binary) Root relaxation: objective 0.000000e+00, 196 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 0 160 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1408 simplex iterations) in 0.05 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:22:57 2012 Optimize a model with 891 rows, 564 columns and 2764 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 889 rows, 556 columns, 2756 nonzeros Variable types: 0 continuous, 556 integer (556 binary) Root relaxation: objective 0.000000e+00, 216 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 6 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (551 simplex iterations) in 0.01 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% optimal solution found: number of colors: 4