current bounds on the number of colors: 0 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:42 2012 Optimize a model with 1135 rows, 955 columns and 4179 nonzeros Presolve removed 4 rows and 84 columns Presolve time: 0.01s Presolved: 1131 rows, 871 columns, 4095 nonzeros Variable types: 0 continuous, 871 integer (871 binary) Root relaxation: objective 0.000000e+00, 80 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 (80 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:42 2012 Optimize a model with 563 rows, 482 columns and 1990 nonzeros Presolve removed 4 rows and 40 columns Presolve time: 0.00s Presolved: 559 rows, 442 columns, 1950 nonzeros Variable types: 0 continuous, 442 integer (442 binary) Root relaxation: objective 0.000000e+00, 76 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 (117 simplex iterations) in 0.00 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:42 2012 Optimize a model with 303 rows, 267 columns and 995 nonzeros Presolve removed 4 rows and 20 columns Presolve time: 0.00s Presolved: 299 rows, 247 columns, 975 nonzeros Variable types: 0 continuous, 247 integer (247 binary) Root relaxation: objective 0.000000e+00, 68 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 (101 simplex iterations) in 0.00 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 18:19:42 2012 Optimize a model with 147 rows, 138 columns and 398 nonzeros Presolve removed 43 rows and 47 columns Presolve time: 0.00s Presolved: 104 rows, 91 columns, 312 nonzeros Variable types: 0 continuous, 91 integer (91 binary) Root relaxation: objective 0.000000e+00, 44 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 39 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (119 simplex iterations) in 0.00 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 18:19:42 2012 Optimize a model with 199 rows, 181 columns and 597 nonzeros Presolve removed 4 rows and 12 columns Presolve time: 0.00s Presolved: 195 rows, 169 columns, 585 nonzeros Variable types: 0 continuous, 169 integer (169 binary) Root relaxation: objective 0.000000e+00, 73 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 (73 simplex iterations) in 0.00 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: 3