current bounds on the number of colors: 0 -- 37 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:33 2012 Optimize a model with 865 rows, 712 columns and 3150 nonzeros Presolve removed 2 rows and 36 columns Presolve time: 0.00s Presolved: 863 rows, 676 columns, 3114 nonzeros Variable types: 0 continuous, 676 integer (676 binary) Root relaxation: objective 0.000000e+00, 75 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 (118 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:33 2012 Optimize a model with 451 rows, 379 columns and 1575 nonzeros Presolve removed 2 rows and 18 columns Presolve time: 0.00s Presolved: 449 rows, 361 columns, 1557 nonzeros Variable types: 0 continuous, 361 integer (361 binary) Root relaxation: objective 0.000000e+00, 65 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 (65 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 18:19:33 2012 Optimize a model with 221 rows, 194 columns and 700 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 219 rows, 186 columns, 692 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Root relaxation: objective 0.000000e+00, 67 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 (100 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 18:19:33 2012 Optimize a model with 129 rows, 120 columns and 350 nonzeros Presolve removed 37 rows and 39 columns Presolve time: 0.00s Presolved: 92 rows, 81 columns, 276 nonzeros Variable types: 0 continuous, 81 integer (81 binary) Root relaxation: objective 0.000000e+00, 38 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 35 - 0.00000 - - 0s Explored 0 nodes (126 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 18:19:33 2012 Optimize a model with 175 rows, 157 columns and 525 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 173 rows, 151 columns, 519 nonzeros Variable types: 0 continuous, 151 integer (151 binary) Root relaxation: objective 0.000000e+00, 72 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 (105 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