current bounds on the number of colors: 0 -- 138 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:18 2012 Optimize a model with 7383 rows, 9627 columns and 31257 nonzeros Presolve removed 22 rows and 1518 columns Presolve time: 0.10s Presolved: 7361 rows, 8109 columns, 29739 nonzeros Variable types: 0 continuous, 8109 integer (8109 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 simplex iterations) in 0.11 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 -- 69 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:18 2012 Optimize a model with 3708 rows, 4797 columns and 15402 nonzeros Presolve removed 22 rows and 748 columns Presolve time: 0.03s Presolved: 3686 rows, 4049 columns, 14654 nonzeros Variable types: 0 continuous, 4049 integer (4049 binary) Root relaxation: objective 0.000000e+00, 203 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 (203 simplex iterations) in 0.03 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 -- 34 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:18 2012 Optimize a model with 1923 rows, 2451 columns and 7701 nonzeros Presolve removed 22 rows and 374 columns Presolve time: 0.01s Presolved: 1901 rows, 2077 columns, 7327 nonzeros Variable types: 0 continuous, 2077 integer (2077 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:18 2012 Optimize a model with 978 rows, 1209 columns and 3624 nonzeros Presolve removed 22 rows and 176 columns Presolve time: 0.00s Presolved: 956 rows, 1033 columns, 3448 nonzeros Variable types: 0 continuous, 1033 integer (1033 binary) Root relaxation: objective 0.000000e+00, 193 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 (193 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:18 2012 Optimize a model with 558 rows, 657 columns and 1812 nonzeros Presolve removed 22 rows and 88 columns Presolve time: 0.00s Presolved: 536 rows, 569 columns, 1724 nonzeros Variable types: 0 continuous, 569 integer (569 binary) Root relaxation: objective 0.000000e+00, 167 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 (167 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 Sat Dec 15 16:18:18 2012 Optimize a model with 348 rows, 381 columns and 906 nonzeros Presolve removed 156 rows and 187 columns Presolve time: 0.00s Presolved: 192 rows, 194 columns, 576 nonzeros Variable types: 0 continuous, 194 integer (194 binary) Root relaxation: objective 0.000000e+00, 94 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 72 - 0.00000 - - 0s Explored 0 nodes (309 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 Sat Dec 15 16:18:18 2012 Optimize a model with 453 rows, 519 columns and 1359 nonzeros Presolve removed 22 rows and 66 columns Presolve time: 0.00s Presolved: 431 rows, 453 columns, 1293 nonzeros Variable types: 0 continuous, 453 integer (453 binary) Root relaxation: objective 0.000000e+00, 173 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 (173 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