current bounds on the number of colors: 0 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:35 2012 Optimize a model with 741 rows, 759 columns and 2831 nonzeros Presolve removed 7 rows and 133 columns Presolve time: 0.00s Presolved: 734 rows, 626 columns, 2698 nonzeros Variable types: 0 continuous, 626 integer (626 binary) Root relaxation: objective 0.000000e+00, 59 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 (59 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:35 2012 Optimize a model with 371 rows, 379 columns and 1341 nonzeros Presolve removed 7 rows and 63 columns Presolve time: 0.00s Presolved: 364 rows, 316 columns, 1278 nonzeros Variable types: 0 continuous, 316 integer (316 binary) Root relaxation: objective 0.000000e+00, 52 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 (52 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:35 2012 Optimize a model with 186 rows, 189 columns and 596 nonzeros Presolve removed 7 rows and 28 columns Presolve time: 0.00s Presolved: 179 rows, 161 columns, 568 nonzeros Variable types: 0 continuous, 161 integer (161 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (82 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 Fri Dec 14 18:19:35 2012 Optimize a model with 112 rows, 113 columns and 298 nonzeros Presolve removed 38 rows and 45 columns Presolve time: 0.00s Presolved: 74 rows, 68 columns, 222 nonzeros Variable types: 0 continuous, 68 integer (68 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 28 - 0.00000 - - 0s Explored 0 nodes (106 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 Fri Dec 14 18:19:35 2012 Optimize a model with 149 rows, 151 columns and 447 nonzeros Presolve removed 7 rows and 21 columns Presolve time: 0.00s Presolved: 142 rows, 130 columns, 426 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Root relaxation: objective 0.000000e+00, 53 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 (53 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