[SMTChecker] Use same sort name for array slice as for the underlying array.

test/libsolidity/smtCheckerTests/abi/abi_encode_array_slice_2.sol

@@ -22,10 +22,12 @@ contract C {
 }
 // ----
 // Warning 6328: (312-342): CHC: Assertion violation happens here.
-// Warning 6328: (548-578): CHC: Assertion violation happens here.
+// Warning 1218: (548-578): CHC: Error trying to invoke SMT solver.
+// Warning 6328: (548-578): CHC: Assertion violation might happen here.
 // Warning 1218: (644-674): CHC: Error trying to invoke SMT solver.
 // Warning 6328: (644-674): CHC: Assertion violation might happen here.
 // Warning 1218: (895-925): CHC: Error trying to invoke SMT solver.
 // Warning 6328: (895-925): CHC: Assertion violation might happen here.
+// Warning 4661: (548-578): BMC: Assertion violation happens here.
 // Warning 4661: (644-674): BMC: Assertion violation happens here.
 // Warning 4661: (895-925): BMC: Assertion violation happens here.

test/libsolidity/smtCheckerTests/operators/slices_2.sol

@@ -0,0 +1,5 @@
+pragma experimental SMTChecker;
+contract e {
+	function f(uint[] calldata) internal {}
+	function h(uint[] calldata c) external { f(c[:]); }
+}

test/libsolidity/smtCheckerTests/operators/slices_3.sol

@@ -0,0 +1,17 @@
+pragma experimental SMTChecker;
+
+contract C {
+int[] s;
+function f(int[] calldata b, uint256 start, uint256 end) public returns (int) {
+    s = b[start:end];
+    uint len = end - start;
+    assert(len == s.length);
+    for (uint i = 0; i < len; i++) {
+        assert(b[start:end][i] == s[i]);
+    }
+    return s[0];
+}
+}
+// ----
+// Warning 6328: (259-290): CHC: Assertion violation might happen here.
+// Warning 4661: (259-290): BMC: Assertion violation happens here.