current bounds on the number of colors: 0 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:19:46 2012 Optimize a model with 16536 rows, 1986 columns and 50804 nonzeros Presolve time: 0.07s Presolved: 16536 rows, 1986 columns, 50804 nonzeros Variable types: 0 continuous, 1986 integer (1986 binary) Root relaxation: objective 0.000000e+00, 170 iterations, 0.02 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 (594 simplex iterations) in 0.13 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 Thu Dec 13 18:19:46 2012 Optimize a model with 8294 rows, 1310 columns and 25402 nonzeros Presolve time: 0.02s Presolved: 8294 rows, 1310 columns, 25402 nonzeros Variable types: 0 continuous, 1310 integer (1310 binary) Root relaxation: objective 0.000000e+00, 118 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 40 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (865 simplex iterations) in 0.09 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 Thu Dec 13 18:19:46 2012 Optimize a model with 3856 rows, 946 columns and 11724 nonzeros Presolve time: 0.01s Presolved: 3856 rows, 946 columns, 11724 nonzeros Variable types: 0 continuous, 946 integer (946 binary) Root relaxation: objective 0.000000e+00, 107 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 88 - 0.00000 - - 0s 0 0 0.00000 0 97 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3029 simplex iterations) in 0.37 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:19:47 2012 Optimize a model with 5758 rows, 1102 columns and 17586 nonzeros Presolve time: 0.02s Presolved: 5758 rows, 1102 columns, 17586 nonzeros Variable types: 0 continuous, 1102 integer (1102 binary) Root relaxation: objective 0.000000e+00, 110 iterations, 0.01 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 48 - 0.00000 - - 0s 0 0 0.00000 0 48 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 1s 0 0 0.00000 0 147 - 0.00000 - - 1s 0 0 0.00000 0 154 - 0.00000 - - 2s 0 0 0.00000 0 79 - 0.00000 - - 2s 0 2 0.00000 0 72 - 0.00000 - - 3s 227 17 0.00000 11 97 - 0.00000 - 84.8 5s 617 31 0.00000 6 109 - 0.00000 - 83.2 10s 622 34 0.00000 5 163 - 0.00000 - 82.5 16s 721 19 0.00000 28 109 - 0.00000 - 134 20s 1317 8 infeasible 25 - 0.00000 - 126 25s Cutting planes: Clique: 15 Zero half: 2 Explored 1360 nodes (189783 simplex iterations) in 25.25 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:20:12 2012 Optimize a model with 7026 rows, 1206 columns and 21494 nonzeros Presolve time: 0.02s Presolved: 7026 rows, 1206 columns, 21494 nonzeros Variable types: 0 continuous, 1206 integer (1206 binary) Root relaxation: objective 0.000000e+00, 115 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 44 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (808 simplex iterations) in 0.07 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:20:13 2012 Optimize a model with 6392 rows, 1154 columns and 19540 nonzeros Presolve time: 0.02s Presolved: 6392 rows, 1154 columns, 19540 nonzeros Variable types: 0 continuous, 1154 integer (1154 binary) Root relaxation: objective 0.000000e+00, 109 iterations, 0.01 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 H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1125 simplex iterations) in 0.08 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: 10