[SMTChecker] Support constants via modules

test/libsolidity/smtCheckerTests/file_level/file_level_call_via_module.sol

@@ -18,7 +18,5 @@ contract C {
 // ====
 // SMTEngine: all
 // ----
-// Warning 8364: (b.sol:95-96): Assertion checker does not yet implement type module "a.sol"
-// Warning 8364: (b.sol:103-104): Assertion checker does not yet implement type module "a.sol"
 // Warning 6328: (b.sol:208-222): CHC: Assertion violation happens here.\nCounterexample:\n\na = 7\nb = 3\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call\n        a.sol:f(2) -- internal call\n        a.sol:f([97, 98, 99]) -- internal call
 // Warning 6328: (b.sol:274-288): CHC: Assertion violation happens here.\nCounterexample:\n\na = 7\nb = 3\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call\n        a.sol:f(2) -- internal call\n        a.sol:f([97, 98, 99]) -- internal call

test/libsolidity/smtCheckerTests/file_level/import.sol

@@ -22,6 +22,5 @@ contract C {
 // ====
 // SMTEngine: all
 // ----
-// Warning 8364: (B:115-116): Assertion checker does not yet implement type module "A"
 // Warning 6328: (B:238-252): CHC: Assertion violation happens here.\nCounterexample:\ndata = {x: 0}\nx = 0\ny = 0\n\nTransaction trace:\nC.constructor()\nState: data = {x: 0}\nC.g()\n    C.f(7) -- internal call\n        A:set({x: 0}, 7) -- internal call\n        A:set({x: 0}, 8) -- internal call
 // Warning 6328: (B:308-322): CHC: Assertion violation happens here.\nCounterexample:\ndata = {x: 0}\nx = 0\ny = 0\n\nTransaction trace:\nC.constructor()\nState: data = {x: 0}\nC.g()\n    C.f(7) -- internal call\n        A:set({x: 0}, 7) -- internal call\n        A:set({x: 0}, 8) -- internal call

test/libsolidity/smtCheckerTests/file_level/module_constants_1.sol

@@ -0,0 +1,26 @@
+==== Source: s1.sol ====
+uint constant a = 89;
+==== Source: s2.sol ====
+uint constant a = 88;
+
+==== Source: s3.sol ====
+import "s1.sol" as M;
+import "s2.sol" as N;
+
+contract C {
+	function f() internal pure returns (uint, uint) {
+		return (M.a, N.a);
+	}
+	function p() public pure {
+		(uint x, uint y) = f();
+		assert(x == 89); // should hold
+		assert(x == 88); // should fail
+		assert(y == 88); // should hold
+		assert(y == 89); // should fail
+	}
+}
+// ====
+// SMTEngine: chc
+// ----
+// Warning 6328: (s3.sol:223-238): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 89\ny = 88\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call
+// Warning 6328: (s3.sol:291-306): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 89\ny = 88\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call

test/libsolidity/smtCheckerTests/file_level/module_constants_functions_1.sol

@@ -0,0 +1,46 @@
+==== Source: s1.sol ====
+uint constant a = 89;
+
+function fre() pure returns (uint) {
+	return a;
+}
+
+==== Source: s2.sol ====
+function foo() pure returns (uint) {
+	return 42;
+}
+
+==== Source: s3.sol ====
+import {fre as foo} from "s1.sol";
+import "s1.sol" as M;
+import "s2.sol" as N;
+
+uint256 constant a = 13;
+
+contract C {
+	function f() internal pure returns (uint, uint, uint, uint) {
+		return (a, foo(), N.foo(), M.a);
+	}
+	function p() public pure {
+		(uint x, uint y, uint z, uint t) = f();
+
+		assert(x == 13); // should hold
+		assert(x == 89); // should fail
+
+		assert(y == 89); // should hold
+		assert(y == 42); // should fail
+
+		assert(z == 42); // should hold
+		assert(z == 89); // should fail
+
+		assert(t == 89); // should hold
+		assert(t == 13); // should fail
+	}
+}
+// ====
+// SMTEngine: all
+// ----
+// Warning 6328: (s3.sol:327-342): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 13\ny = 89\nz = 42\nt = 89\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call\n        s1.sol:fre() -- internal call\n        s2.sol:foo() -- internal call
+// Warning 6328: (s3.sol:396-411): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 13\ny = 89\nz = 42\nt = 89\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call\n        s1.sol:fre() -- internal call\n        s2.sol:foo() -- internal call
+// Warning 6328: (s3.sol:465-480): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 13\ny = 89\nz = 42\nt = 89\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call\n        s1.sol:fre() -- internal call\n        s2.sol:foo() -- internal call
+// Warning 6328: (s3.sol:534-549): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 13\ny = 89\nz = 42\nt = 89\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call\n        s1.sol:fre() -- internal call\n        s2.sol:foo() -- internal call

test/libsolidity/smtCheckerTests/file_level/same_constants_different_files.sol

@@ -22,13 +22,10 @@ contract C {
 		(uint x, uint y, uint z, uint t) = f();
 		assert(x == 13); // should hold
 		assert(y == 89); // should hold
-		assert(z == 89); // should hold but the SMTChecker does not implement module access
+		assert(z == 89); // should hold
 		assert(t == 89); // should hold
 	}
 }
 // ====
 // SMTEngine: all
 // ----
-// Warning 7650: (s2.sol:182-185): Assertion checker does not yet support this expression.
-// Warning 8364: (s2.sol:182-183): Assertion checker does not yet implement type module "s1.sol"
-// Warning 6328: (s2.sol:334-349): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 13\ny = 89\nz = 0\nt = 89\n\nTransaction trace:\nC.constructor()\nC.p()\n    C.f() -- internal call\n        s1.sol:fre() -- internal call

test/libsolidity/smtCheckerTests/imports/import_as_module_2.sol

@@ -18,7 +18,5 @@ function f(uint _x) pure {
 // ====
 // SMTEngine: all
 // ----
-// Warning 8364: (A:118-119): Assertion checker does not yet implement type module "s1.sol"
-// Warning 8364: (A:145-146): Assertion checker does not yet implement type module "s1.sol"
 // Warning 6328: (A:50-64): CHC: Assertion violation happens here.\nCounterexample:\n\n_y = 0\n\nTransaction trace:\nD.constructor()\nD.g(0)\n    s1.sol:f(200) -- internal call\n    s1.sol:f(0) -- internal call\n    A:f(10) -- internal call\n    A:f(0) -- internal call
 // Warning 6328: (s1.sol:28-44): CHC: Assertion violation happens here.\nCounterexample:\n\n_y = 0\n\nTransaction trace:\nD.constructor()\nD.g(0)\n    s1.sol:f(200) -- internal call\n    s1.sol:f(0) -- internal call