Dear Bilal Sarwar,
If KisSplice is taking too much time to run, you could try running the experimental algorithm by adding --experimental to your command line. It can be faster, at the cost of using more RAM.
Note also that by using -s 1 you will get only the Type0a-SNPs, which are single SNP within the sequence. If you are interested in multiple SNPs, you need to use -s 2.
You can find the full documentation of KisSplice options here: KisSplice Documentation
Kind regards.