adding non-linear product test
adding non-linear product test

rolph-recto/liquidhaskell,Kyly/liquidhaskell,abakst/liquidhaskell,abakst/liquidhaskell,abakst/liquidhaskell,abakst/liquidhaskell,rolph-recto/liquidhaskell,spinda/liquidhaskell,rolph-recto/liquidhaskell,rolph-recto/liquidhaskell,spinda/liquidhaskell,spinda/liquidhaskell,spinda/liquidhaskell,abakst/liquidhaskell,Kyly/liquidhaskell,mightymoose/liquidhaskell,abakst/liquidhaskell,Kyly/liquidhaskell,mightymoose/liquidhaskell,Kyly/liquidhaskell,mightymoose/liquidhaskell,mightymoose/liquidhaskell,mightymoose/liquidhaskell,Kyly/liquidhaskell,rolph-recto/liquidhaskell,rolph-recto/liquidhaskell,Kyly/liquidhaskell,mightymoose/liquidhaskell,spinda/liquidhaskell,spinda/liquidhaskell