// The program checks if x is an element of the array a.

// N is an experiment parameter; replace it with a concrete value.

memberOf(x:int, a:[]int | found:bool) {
   // N is an experiment parameter
   assume #a>=N && #a>=0
          && (exists k:: 0<=k && k<#a && a[k]=x) ;
   var k:int {
     k := 0 ;
     found := false ;
     while k<#a do { // deliberately iterating till the end of array
       if a[k]=x
          then { found := true }
          else { skip } ;
       k := k+1
     } ;
     // adding few more checks:
     assert found && k>=0 && k=#a && k>=N
   } 
}