const x: int; const y: int; const z: int; const r: real; const s: real; const t: real; const P: bool; const Q: bool; const R: bool; axiom x * (y + z) == x + y * z; axiom x * y + z == (x + y) * z; axiom x * y * z == x * y * z; axiom x * y * z * x == x * y * z; axiom x div y div z == x div (y div z); axiom x div y div (z div x) == x div y div z; axiom x + y mod z == y mod z + x; axiom (x + y) mod z == x mod z + y mod z; axiom x / y / z == x / (y / z); axiom x / y / (z / x) == x / y / z; axiom x / s / z == x / (s / z); axiom x / s / (z / x) == x / s / z; axiom r / s / t == r / (s / t); axiom r / s / (t / r) == r / s / t; axiom r * s / t == r * s / t; axiom r / s * t == r / s * t; axiom (r * s) ** t == r ** t * s ** t; axiom r ** (s + t) == r ** s * r ** t; axiom int(real(x)) == x; axiom r >= 0e0 ==> real(int(r)) <= r; axiom int(0e0 - 2e-2) == 0; axiom int(0e0 - 35e0) == -35; axiom int(27e-1) == 2; axiom x - y - z == x - (y - z); axiom x - y - (z - x) == x - y - z; axiom x + y - z - x + y == 0; axiom x + y - z - x + y == x + y - (z - (x + y)); axiom P ==> Q ==> R <==> P ==> Q ==> R; axiom (P ==> Q) ==> R ==> P <==> (P ==> Q) ==> R; axiom P <==> Q <==> R; axiom P ==> Q <==> Q ==> R <==> R ==> P; axiom (P && Q) || (Q && R); axiom (P || Q) && (Q || R); axiom P || Q || Q || R; axiom P && Q && Q && R; function f(int) : int; axiom (forall x: int :: {:xname "hello"} {:weight 5} {:ValueFunc f(x + 1)} { f(x + x) } { f(x) * f(x) } {:nopats f(x + x + x) } f(f(x)) < 200); Boogie program verifier finished with 0 verified, 0 errors