Update smtCheckerTests for z3 4.8.10

test/libsolidity/smtCheckerTests/types/struct/struct_state_var.sol

@@ -12,5 +12,7 @@ contract C {
 		assert(s.a[1] == s.a[0]);
 	}
 }
+// ====
+// SMTIgnoreCex: yes
 // ----
-// Warning 6328: (148-172): CHC: Assertion violation happens here.\nCounterexample:\ns = {x: 7720, a: []}\n_x = 7720\n\nTransaction trace:\nC.constructor()\nState: s = {x: 0, a: []}\nC.f(7720)
+// Warning 6328: (148-172): CHC: Assertion violation happens here.

test/libyul/yulOptimizerTests/reasoningBasedSimplifier/addmod.yul

@@ -9,6 +9,8 @@
 
     // addmod is equal to mod of sum for small numbers
     if and(and(lt(x, 1000), lt(y, 1000)), lt(z, 1000)) {
+        // z3 <4.8.10 was able to infer that the
+        // condition below is always true.
         if eq(result, mod(add(x, y), z)) { sstore(0, 9) }
     }
 
@@ -26,6 +28,9 @@
 //     let z := calldataload(64)
 //     let result := addmod(x, y, z)
 //     if 0 { }
-//     if and(and(lt(x, 1000), lt(y, 1000)), lt(z, 1000)) { if 1 { sstore(0, 9) } }
+//     if and(and(lt(x, 1000), lt(y, 1000)), lt(z, 1000))
+//     {
+//         if eq(result, mod(add(x, y), z)) { sstore(0, 9) }
+//     }
 //     if and(and(gt(x, sub(0, 5)), gt(y, sub(0, 2))), eq(z, 3)) { if 0 { } }
 // }