current bounds on the number of colors: 0 -- 37 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:16 2012 Optimize a model with 6103 rows, 1003 columns and 18864 nonzeros Presolve time: 0.02s Presolved: 6103 rows, 1003 columns, 18864 nonzeros Variable types: 0 continuous, 1003 integer (1003 binary) Root relaxation: objective 0.000000e+00, 90 iterations, 0.01 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 (188 simplex iterations) in 0.04 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 17:58:16 2012 Optimize a model with 3070 rows, 670 columns and 9432 nonzeros Presolve time: 0.01s Presolved: 3070 rows, 670 columns, 9432 nonzeros Variable types: 0 continuous, 670 integer (670 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 0.00000 0 20 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (697 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:16 2012 Optimize a model with 1385 rows, 485 columns and 4192 nonzeros Presolve time: 0.00s Presolved: 1385 rows, 485 columns, 4192 nonzeros Variable types: 0 continuous, 485 integer (485 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 0.00000 0 58 - 0.00000 - - 0s 0 0 0.00000 0 65 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1485 simplex iterations) in 0.12 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:16 2012 Optimize a model with 2059 rows, 559 columns and 6288 nonzeros Presolve time: 0.01s Presolved: 2059 rows, 559 columns, 6288 nonzeros Variable types: 0 continuous, 559 integer (559 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 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1734 simplex iterations) in 0.12 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:16 2012 Optimize a model with 2396 rows, 596 columns and 7336 nonzeros Presolve time: 0.01s Presolved: 2396 rows, 596 columns, 7336 nonzeros Variable types: 0 continuous, 596 integer (596 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 0.00000 0 28 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 0s 0 0 0.00000 0 162 - 0.00000 - - 0s 0 0 0.00000 0 143 - 0.00000 - - 0s 0 0 0.00000 0 119 - 0.00000 - - 0s 0 0 0.00000 0 124 - 0.00000 - - 0s 0 0 0.00000 0 139 - 0.00000 - - 1s 0 0 0.00000 0 139 - 0.00000 - - 1s 0 2 0.00000 0 127 - 0.00000 - - 1s Cutting planes: Clique: 41 Zero half: 7 Explored 9 nodes (14142 simplex iterations) in 1.49 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:18 2012 Optimize a model with 2733 rows, 633 columns and 8384 nonzeros Presolve time: 0.01s Presolved: 2733 rows, 633 columns, 8384 nonzeros Variable types: 0 continuous, 633 integer (633 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 0.00000 0 24 - 0.00000 - - 0s 0 0 0.00000 0 33 - 0.00000 - - 0s 0 0 0.00000 0 10 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 0s 0 0 0.00000 0 110 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 81 - 0.00000 - - 0s 0 0 0.00000 0 76 - 0.00000 - - 0s 0 0 0.00000 0 82 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 35 - 0.00000 - - 1s 0 2 0.00000 0 33 - 0.00000 - - 1s * 171 0 11 0.0000000 0.00000 0.0% 35.1 1s Cutting planes: Clique: 13 Explored 172 nodes (20227 simplex iterations) in 1.44 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: 8