current bounds on the number of colors: 0 -- 36 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:48 2012 Optimize a model with 1386 rows, 723 columns and 4698 nonzeros Presolve removed 1 rows and 18 columns Presolve time: 0.01s Presolved: 1385 rows, 705 columns, 4680 nonzeros Variable types: 0 continuous, 705 integer (705 binary) Root relaxation: objective 0.000000e+00, 70 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 (122 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 Thu Dec 13 19:35:49 2012 Optimize a model with 711 rows, 399 columns and 2349 nonzeros Presolve removed 1 rows and 9 columns Presolve time: 0.00s Presolved: 710 rows, 390 columns, 2340 nonzeros Variable types: 0 continuous, 390 integer (390 binary) Root relaxation: objective 0.000000e+00, 74 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 (74 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 Thu Dec 13 19:35:49 2012 Optimize a model with 336 rows, 219 columns and 1044 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 335 rows, 215 columns, 1040 nonzeros Variable types: 0 continuous, 215 integer (215 binary) Root relaxation: objective 0.000000e+00, 80 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 (140 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 Thu Dec 13 19:35:49 2012 Optimize a model with 186 rows, 147 columns and 522 nonzeros Presolve removed 36 rows and 37 columns Presolve time: 0.00s Presolved: 150 rows, 110 columns, 450 nonzeros Variable types: 0 continuous, 110 integer (110 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 0.00000 0 35 - 0.00000 - - 0s Explored 0 nodes (145 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 Thu Dec 13 19:35:49 2012 Optimize a model with 261 rows, 183 columns and 783 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 260 rows, 180 columns, 780 nonzeros Variable types: 0 continuous, 180 integer (180 binary) Root relaxation: objective 0.000000e+00, 76 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 60 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 0.00000 0 65 - 0.00000 - - 0s 0 0 0.00000 0 75 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 2 0.00000 0 48 - 0.00000 - - 0s Cutting planes: Zero half: 7 Explored 3 nodes (1386 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4