How to run counter program in modelsim?

Required. Modelsim has features to generate test benches for a design interactively. Most people are writing it from the scratch however.

There's also the University Program way to use legacy VWF signal waveforms as stimulus. But it's very restricted because the test bench can only use unconditional stimuli and can't interact with the DUT. It's nevertheless a short cut for very basic simulations.