current bounds on the number of colors: 0 -- 32 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 832 rows, 562 columns and 2912 nonzeros Presolve removed 1 rows and 16 columns Presolve time: 0.00s Presolved: 831 rows, 546 columns, 2896 nonzeros Variable types: 0 continuous, 546 integer (546 binary) Root relaxation: objective 0.000000e+00, 57 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 (57 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 -- 16 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 432 rows, 306 columns and 1456 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.00s Presolved: 431 rows, 298 columns, 1448 nonzeros Variable types: 0 continuous, 298 integer (298 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 (103 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 Thu Dec 13 19:35:44 2012 Optimize a model with 232 rows, 178 columns and 728 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 231 rows, 174 columns, 724 nonzeros Variable types: 0 continuous, 174 integer (174 binary) Root relaxation: objective 0.000000e+00, 74 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 (74 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 Thu Dec 13 19:35:44 2012 Optimize a model with 132 rows, 114 columns and 364 nonzeros Presolve removed 32 rows and 33 columns Presolve time: 0.00s Presolved: 100 rows, 81 columns, 300 nonzeros Variable types: 0 continuous, 81 integer (81 binary) Root relaxation: objective 0.000000e+00, 31 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 31 - 0.00000 - - 0s Explored 0 nodes (83 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 Thu Dec 13 19:35:44 2012 Optimize a model with 182 rows, 146 columns and 546 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 181 rows, 143 columns, 543 nonzeros Variable types: 0 continuous, 143 integer (143 binary) Root relaxation: objective 0.000000e+00, 69 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 (115 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