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 3180 rows, 1904 columns and 11160 nonzeros Presolve removed 2 rows and 60 columns Presolve time: 0.02s Presolved: 3178 rows, 1844 columns, 11100 nonzeros Variable types: 0 continuous, 1844 integer (1844 binary) Root relaxation: objective 0.000000e+00, 136 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 (136 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 18:20:15 2012 Optimize a model with 1620 rows, 1004 columns and 5580 nonzeros Presolve removed 2 rows and 30 columns Presolve time: 0.01s Presolved: 1618 rows, 974 columns, 5550 nonzeros Variable types: 0 continuous, 974 integer (974 binary) Root relaxation: objective 0.000000e+00, 134 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 (212 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 18:20:15 2012 Optimize a model with 788 rows, 524 columns and 2604 nonzeros Presolve removed 2 rows and 14 columns Presolve time: 0.00s Presolved: 786 rows, 510 columns, 2590 nonzeros Variable types: 0 continuous, 510 integer (510 binary) Root relaxation: objective 0.000000e+00, 125 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 (125 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 18:20:15 2012 Optimize a model with 372 rows, 284 columns and 1116 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 370 rows, 278 columns, 1110 nonzeros Variable types: 0 continuous, 278 integer (278 binary) Root relaxation: objective 0.000000e+00, 159 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 27 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (311 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 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:15 2012 Optimize a model with 164 rows, 164 columns and 372 nonzeros Presolve removed 164 rows and 164 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 18:20:15 2012 Optimize a model with 268 rows, 224 columns and 744 nonzeros Presolve removed 60 rows and 62 columns Presolve time: 0.00s Presolved: 208 rows, 162 columns, 624 nonzeros Variable types: 0 continuous, 162 integer (162 binary) Root relaxation: objective 0.000000e+00, 63 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 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (231 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