current bounds on the number of colors: 0 -- 60 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 2550 rows, 1883 columns and 9270 nonzeros Presolve removed 2 rows and 60 columns Presolve time: 0.02s Presolved: 2548 rows, 1823 columns, 9210 nonzeros Variable types: 0 continuous, 1823 integer (1823 binary) Root relaxation: objective 0.000000e+00, 106 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 (106 simplex iterations) in 0.02 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 -- 30 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 1305 rows, 983 columns and 4635 nonzeros Presolve removed 2 rows and 30 columns Presolve time: 0.01s Presolved: 1303 rows, 953 columns, 4605 nonzeros Variable types: 0 continuous, 953 integer (953 binary) Root relaxation: objective 0.000000e+00, 109 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 (109 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 641 rows, 503 columns and 2163 nonzeros Presolve removed 2 rows and 14 columns Presolve time: 0.00s Presolved: 639 rows, 489 columns, 2149 nonzeros Variable types: 0 continuous, 489 integer (489 binary) Root relaxation: objective 0.000000e+00, 121 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 (178 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 309 rows, 263 columns and 927 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 307 rows, 257 columns, 921 nonzeros Variable types: 0 continuous, 257 integer (257 binary) Root relaxation: objective 0.000000e+00, 129 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 (175 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 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 143 rows, 143 columns and 309 nonzeros Presolve removed 143 rows and 143 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 226 rows, 203 columns and 618 nonzeros Presolve removed 62 rows and 65 columns Presolve time: 0.00s Presolved: 164 rows, 138 columns, 492 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Root relaxation: objective 0.000000e+00, 60 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 56 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (212 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 - optimal solution found: number of colors: 3