current bounds on the number of colors: 0 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:32 2012 Optimize a model with 511 rows, 623 columns and 2023 nonzeros Presolve removed 5 rows and 85 columns Presolve time: 0.00s Presolved: 506 rows, 538 columns, 1938 nonzeros Variable types: 0 continuous, 538 integer (538 binary) Root relaxation: objective 0.000000e+00, 51 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 (51 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:32 2012 Optimize a model with 259 rows, 308 columns and 952 nonzeros Presolve removed 5 rows and 40 columns Presolve time: 0.00s Presolved: 254 rows, 268 columns, 912 nonzeros Variable types: 0 continuous, 268 integer (268 binary) Root relaxation: objective 0.000000e+00, 54 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 0.00 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:32 2012 Optimize a model with 147 rows, 168 columns and 476 nonzeros Presolve removed 5 rows and 20 columns Presolve time: 0.00s Presolved: 142 rows, 148 columns, 456 nonzeros Variable types: 0 continuous, 148 integer (148 binary) Root relaxation: objective 0.000000e+00, 43 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 (43 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:32 2012 Optimize a model with 91 rows, 98 columns and 238 nonzeros Presolve removed 37 rows and 43 columns Presolve time: 0.00s Presolved: 54 rows, 55 columns, 162 nonzeros Variable types: 0 continuous, 55 integer (55 binary) Root relaxation: objective 0.000000e+00, 26 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 20 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (86 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:32 2012 Optimize a model with 119 rows, 133 columns and 357 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 114 rows, 118 columns, 342 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Root relaxation: objective 0.000000e+00, 40 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 (40 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