current bounds on the number of colors: 0 -- 104 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:24 2012 Optimize a model with 2600 rows, 5456 columns and 12896 nonzeros Presolve removed 43 rows and 2236 columns Presolve time: 0.03s Presolved: 2557 rows, 3220 columns, 10660 nonzeros Variable types: 0 continuous, 3220 integer (3220 binary) Root relaxation: objective 0.000000e+00, 97 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 (97 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 -- 52 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:24 2012 Optimize a model with 1352 rows, 2752 columns and 6448 nonzeros Presolve removed 43 rows and 1118 columns Presolve time: 0.01s Presolved: 1309 rows, 1634 columns, 5330 nonzeros Variable types: 0 continuous, 1634 integer (1634 binary) Root relaxation: objective 0.000000e+00, 97 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 (97 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 -- 26 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:24 2012 Optimize a model with 728 rows, 1400 columns and 3224 nonzeros Presolve removed 43 rows and 559 columns Presolve time: 0.00s Presolved: 685 rows, 841 columns, 2665 nonzeros Variable types: 0 continuous, 841 integer (841 binary) Root relaxation: objective 0.000000e+00, 96 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 (96 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:24 2012 Optimize a model with 392 rows, 672 columns and 1488 nonzeros Presolve removed 43 rows and 258 columns Presolve time: 0.00s Presolved: 349 rows, 414 columns, 1230 nonzeros Variable types: 0 continuous, 414 integer (414 binary) Root relaxation: objective 0.000000e+00, 95 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 (95 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:24 2012 Optimize a model with 248 rows, 360 columns and 744 nonzeros Presolve removed 43 rows and 129 columns Presolve time: 0.00s Presolved: 205 rows, 231 columns, 615 nonzeros Variable types: 0 continuous, 231 integer (231 binary) Root relaxation: objective 0.000000e+00, 81 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 (81 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 Sat Dec 15 16:15:24 2012 Optimize a model with 152 rows, 152 columns and 248 nonzeros Presolve removed 152 rows and 152 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 Sat Dec 15 16:15:24 2012 Optimize a model with 200 rows, 256 columns and 496 nonzeros Presolve removed 116 rows and 165 columns Presolve time: 0.00s Presolved: 84 rows, 91 columns, 252 nonzeros Variable types: 0 continuous, 91 integer (91 binary) Root relaxation: objective 0.000000e+00, 32 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 (32 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: 2