current bounds on the number of colors: 0 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:39 2012 Optimize a model with 1218 rows, 938 columns and 4410 nonzeros Presolve removed 2 rows and 42 columns Presolve time: 0.01s Presolved: 1216 rows, 896 columns, 4368 nonzeros Variable types: 0 continuous, 896 integer (896 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:40 2012 Optimize a model with 602 rows, 476 columns and 2100 nonzeros Presolve removed 2 rows and 20 columns Presolve time: 0.00s Presolved: 600 rows, 456 columns, 2080 nonzeros Variable types: 0 continuous, 456 integer (456 binary) Root relaxation: objective 0.000000e+00, 85 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 (135 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:40 2012 Optimize a model with 322 rows, 266 columns and 1050 nonzeros Presolve removed 2 rows and 10 columns Presolve time: 0.00s Presolved: 320 rows, 256 columns, 1040 nonzeros Variable types: 0 continuous, 256 integer (256 binary) Root relaxation: objective 0.000000e+00, 78 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 (78 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:40 2012 Optimize a model with 154 rows, 140 columns and 420 nonzeros Presolve removed 42 rows and 44 columns Presolve time: 0.00s Presolved: 112 rows, 96 columns, 336 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Root relaxation: objective 0.000000e+00, 45 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 40 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (141 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:40 2012 Optimize a model with 210 rows, 182 columns and 630 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 208 rows, 176 columns, 624 nonzeros Variable types: 0 continuous, 176 integer (176 binary) Root relaxation: objective 0.000000e+00, 84 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 (126 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