Infinitely presented graphical small cancellation groups are acylindrically hyperbolic

We prove that infinitely presented graphical G r ( 7 ) small cancellation groups are acylindrically hyperbolic. In particular, infinitely presented classical C ( 7 ) -groups and, hence, classical C ' ( 1 6 ) -groups are acylindrically hyperbolic. We also prove the analogous statements for the larger class of graphical small cancellation presentations over free products. We construct infinitely presented classical C ' ( 1 6 ) -groups that provide new examples of divergence functions of groups.