current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 2268 rows, 1540 columns and 8100 nonzeros Presolve removed 1 rows and 27 columns Presolve time: 0.01s Presolved: 2267 rows, 1513 columns, 8073 nonzeros Variable types: 0 continuous, 1513 integer (1513 binary) Root relaxation: objective 0.000000e+00, 104 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 (104 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 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 1120 rows, 784 columns and 3900 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.00s Presolved: 1119 rows, 771 columns, 3887 nonzeros Variable types: 0 continuous, 771 integer (771 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 (179 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 546 rows, 406 columns and 1800 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.00s Presolved: 545 rows, 400 columns, 1794 nonzeros Variable types: 0 continuous, 400 integer (400 binary) Root relaxation: objective 0.000000e+00, 100 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 (148 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 300 rows, 244 columns and 900 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 299 rows, 241 columns, 897 nonzeros Variable types: 0 continuous, 241 integer (241 binary) Root relaxation: objective 0.000000e+00, 111 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 18:20:01 2012 Optimize a model with 136 rows, 136 columns and 300 nonzeros Presolve removed 136 rows and 136 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 18:20:01 2012 Optimize a model with 218 rows, 190 columns and 600 nonzeros Presolve removed 54 rows and 55 columns Presolve time: 0.00s Presolved: 164 rows, 135 columns, 492 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Root relaxation: objective 0.000000e+00, 58 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 53 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (213 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