current bounds on the number of colors: 0 -- 29 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:26 2012 Optimize a model with 337 rows, 428 columns and 1330 nonzeros Presolve removed 7 rows and 98 columns Presolve time: 0.00s Presolved: 330 rows, 330 columns, 1232 nonzeros Variable types: 0 continuous, 330 integer (330 binary) Root relaxation: objective 0.000000e+00, 41 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 (61 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 -- 14 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:26 2012 Optimize a model with 183 rows, 225 columns and 665 nonzeros Presolve removed 7 rows and 49 columns Presolve time: 0.00s Presolved: 176 rows, 176 columns, 616 nonzeros Variable types: 0 continuous, 176 integer (176 binary) Root relaxation: objective 0.000000e+00, 36 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 (36 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 18:19:26 2012 Optimize a model with 95 rows, 109 columns and 285 nonzeros Presolve removed 7 rows and 21 columns Presolve time: 0.00s Presolved: 88 rows, 88 columns, 264 nonzeros Variable types: 0 continuous, 88 integer (88 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 6 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (67 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 18:19:26 2012 Optimize a model with 51 rows, 51 columns and 95 nonzeros Presolve removed 51 rows and 51 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 18:19:26 2012 Optimize a model with 73 rows, 80 columns and 190 nonzeros Presolve removed 31 rows and 39 columns Presolve time: 0.00s Presolved: 42 rows, 41 columns, 126 nonzeros Variable types: 0 continuous, 41 integer (41 binary) Root relaxation: objective 0.000000e+00, 19 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 15 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (65 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