Constructing majority-rule supertrees

Table 2 Summary of experimental results with the basic ILP method

Data set	n	m	k	U	%U	N	Sol. (sec)	Verif. (sec)
Drosophila A	9	17	5	60	39.2	9.8 e5	0.83	1.6
Primates	33	48	3	590	37.3	7.8 e7	15.83	2.86
Drosophila B	40	55	4	1133	51.5	1.25 e9	362	19
Chordata A	38	290	6	330	3	1.40 e8	120	258
Chordata B	38	411	12	306	2	1.05 e8	986	1784

Size and solution times for the ILP formulations of the various data sets. Here U denotes the number of question marks in M(P), the matrix representation of the input; N is the size of the CPLEX-generated reduced ILP; n, m, and k are as in Table 1. Shown are the time to solve the ILP and produce an optimal candidate supertree T* and the time to verify all the splits of T* to produce Maj⁺(P).

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