Merge pull request #4645 from ethereum/smt-syntax-tests

Move SMT tests to use isoltest

47 files changed, 491 insertions, 593 deletions

diff --git a/test/libsolidity/SMTChecker.cpp b/test/libsolidity/SMTChecker.cpp
index 13fcc5b4..a49618bd 100644
--- a/test/libsolidity/SMTChecker.cpp
+++ b/test/libsolidity/SMTChecker.cpp
@@ -56,599 +56,6 @@ protected:
 
 BOOST_FIXTURE_TEST_SUITE(SMTChecker, SMTCheckerFramework)
 
-BOOST_AUTO_TEST_CASE(smoke_test)
-{
-	string text = R"(
-		contract C { }
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-}
-
-BOOST_AUTO_TEST_CASE(simple_overflow)
-{
-	string text = R"(
-		contract C {
-			function f(uint a, uint b) public pure returns (uint) { return a + b; }
-		}
-	)";
-	CHECK_WARNING(text, "Overflow (resulting value larger than");
-}
-
-BOOST_AUTO_TEST_CASE(warn_on_typecast)
-{
-	string text = R"(
-		contract C {
-			function f() public pure returns (uint) {
-				return uint8(1);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion checker does not yet implement this expression.");
-}
-
-BOOST_AUTO_TEST_CASE(warn_on_struct)
-{
-	string text = R"(
-		pragma experimental ABIEncoderV2;
-		contract C {
-			struct A { uint a; uint b; }
-			function f() public pure returns (A memory) {
-				return A({ a: 1, b: 2 });
-			}
-		}
-	)";
-	CHECK_WARNING_ALLOW_MULTI(text, (vector<string>{
-		"Experimental feature",
-		"Assertion checker does not yet implement this expression.",
-		"Assertion checker does not yet support the type of this variable."
-	}));
-}
-
-BOOST_AUTO_TEST_CASE(simple_assert)
-{
-	string text = R"(
-		contract C {
-			function f(uint a) public pure { assert(a == 2); }
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-}
-
-BOOST_AUTO_TEST_CASE(simple_assert_with_require)
-{
-	string text = R"(
-		contract C {
-			function f(uint a) public pure { require(a < 10); assert(a < 20); }
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-}
-
-BOOST_AUTO_TEST_CASE(assignment_in_declaration)
-{
-	string text = R"(
-		contract C {
-			function f() public pure { uint a = 2; assert(a == 2); }
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-}
-
-BOOST_AUTO_TEST_CASE(branches_merge_variables)
-{
-	// Branch does not touch variable a
-	string text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 3;
-				if (x > 10) {
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	// Positive branch touches variable a, but assertion should still hold.
-	text = R"(
-	contract C {
-			function f(uint x) public pure {
-				uint a = 3;
-				if (x > 10) {
-					a = 3;
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	// Negative branch touches variable a, but assertion should still hold.
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 3;
-				if (x > 10) {
-				} else {
-					a = 3;
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	// Variable is not merged, if it is only read.
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 3;
-				if (x > 10) {
-					assert(a == 3);
-				} else {
-					assert(a == 3);
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	// Variable is reset in both branches
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 2;
-				if (x > 10) {
-					a = 3;
-				} else {
-					a = 3;
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	// Variable is reset in both branches
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 2;
-				if (x > 10) {
-					a = 3;
-				} else {
-					a = 4;
-				}
-				assert(a >= 3);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-}
-
-BOOST_AUTO_TEST_CASE(branches_assert_condition)
-{
-	string text = R"(
-		contract C {
-			function f(uint x) public pure {
-				if (x > 10) {
-					assert(x > 9);
-				}
-				else
-				{
-					assert(x < 11);
-				}
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				if (x > 10) {
-					assert(x > 9);
-				}
-				else if (x > 2)
-				{
-					assert(x <= 10 && x > 2);
-				}
-				else
-				{
-				   assert(0 <= x && x <= 2);
-				}
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-}
-
-BOOST_AUTO_TEST_CASE(ways_to_merge_variables)
-{
-	string text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 3;
-				if (x > 10) {
-					a++;
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 3;
-				if (x > 10) {
-					++a;
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint a = 3;
-				if (x > 10) {
-					a = 5;
-				}
-				assert(a == 3);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-}
-
-BOOST_AUTO_TEST_CASE(bool_simple)
-{
-	string text = R"(
-		contract C {
-			function f(bool x) public pure {
-				assert(x);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	text = R"(
-		contract C {
-			function f(bool x, bool y) public pure {
-				assert(x == y);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	text = R"(
-		contract C {
-			function f(bool x, bool y) public pure {
-				bool z = x || y;
-				assert(!(x && y) || z);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(bool x) public pure {
-				if (x) {
-					assert(x);
-				} else {
-					assert(!x);
-				}
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(bool x) public pure {
-				bool y = x;
-				assert(x == y);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(bool x) public pure {
-				require(x);
-				bool y;
-				y = false;
-				assert(x || y);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-}
-
-BOOST_AUTO_TEST_CASE(bool_int_mixed)
-{
-	string text = R"(
-		contract C {
-			function f(bool x) public pure {
-				uint a;
-				if (x)
-					a = 1;
-				assert(!x || a > 0);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(bool x, uint a) public pure {
-				require(!x || a > 0);
-				uint b = a;
-				assert(!x || b > 0);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(bool x, bool y) public pure {
-				uint a;
-				if (x) {
-					if (y) {
-						a = 0;
-					} else {
-						a = 1;
-					}
-				} else {
-					if (y) {
-						a = 1;
-					} else {
-						a = 0;
-					}
-				}
-				bool xor_x_y = (x && !y) || (!x && y);
-				assert(!xor_x_y || a > 0);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-}
-
-BOOST_AUTO_TEST_CASE(storage_value_vars)
-{
-	string text = R"(
-		contract C
-		{
-			address a;
-			bool b;
-			uint c;
-			function f(uint x) public {
-				if (x == 0)
-				{
-					a = 0x0000000000000000000000000000000000000100;
-					b = true;
-				}
-				else
-				{
-					a = 0x0000000000000000000000000000000000000200;
-					b = false;
-				}
-				assert(a > 0x0000000000000000000000000000000000000000 && b);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	text = R"(
-		contract C
-		{
-			address a;
-			bool b;
-			uint c;
-			function f() public view {
-				assert(c > 0);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	text = R"(
-		contract C
-		{
-			function f(uint x) public {
-				if (x == 0)
-				{
-					a = 0x0000000000000000000000000000000000000100;
-					b = true;
-				}
-				else
-				{
-					a = 0x0000000000000000000000000000000000000200;
-					b = false;
-				}
-				assert(b == (a < 0x0000000000000000000000000000000000000200));
-			}
-
-			function g() public view {
-				require(a < 0x0000000000000000000000000000000000000100);
-				assert(c >= 0);
-			}
-			address a;
-			bool b;
-			uint c;
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C
-		{
-			function f() public view {
-				assert(c > 0);
-			}
-			uint c;
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-
-}
-
-BOOST_AUTO_TEST_CASE(while_loop_simple)
-{
-	// Check that variables are cleared
-	string text = R"(
-		contract C {
-			function f(uint x) public pure {
-				x = 2;
-				while (x > 1) {
-					x = 2;
-				}
-				assert(x == 2);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	// Check that condition is assumed.
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				while (x == 2) {
-					assert(x == 2);
-				}
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	// Check that condition is not assumed after the body anymore
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				while (x == 2) {
-				}
-				assert(x == 2);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	// Check that negation of condition is not assumed after the body anymore
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				while (x == 2) {
-				}
-				assert(x != 2);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-	// Check that side-effects of condition are taken into account
-	text = R"(
-		contract C {
-			function f(uint x, uint y) public pure {
-				x = 7;
-				while ((x = y) > 0) {
-				}
-				assert(x == 7);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation happens here");
-}
-
-BOOST_AUTO_TEST_CASE(constant_condition)
-{
-	string text = R"(
-		contract C {
-			function f(uint x) public pure {
-				if (x >= 0) { revert(); }
-			}
-		}
-	)";
-	CHECK_WARNING_ALLOW_MULTI(text, (vector<string>{
-		"Condition is always true",
-		"Assertion checker does not yet implement this type of function call"
-	}));
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				if (x >= 10) { if (x < 10) { revert(); } }
-			}
-		}
-	)";
-	CHECK_WARNING_ALLOW_MULTI(text, (vector<string>{
-		"Condition is always false",
-		"Assertion checker does not yet implement this type of function call"
-	}));
-	// a plain literal constant is fine
-	text = R"(
-		contract C {
-			function f(uint) public pure {
-				if (true) { revert(); }
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion checker does not yet implement this type of function call");
-}
-
-
-BOOST_AUTO_TEST_CASE(for_loop)
-{
-	string text = R"(
-		contract C {
-			function f(uint x) public pure {
-				require(x == 2);
-				for (;;) {}
-				assert(x == 2);
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				for (; x == 2; ) {
-					assert(x == 2);
-				}
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				for (uint y = 2; x < 10; ) {
-					assert(y == 2);
-				}
-			}
-		}
-	)";
-	CHECK_SUCCESS_NO_WARNINGS(text);
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				for (uint y = 2; x < 10; y = 3) {
-					assert(y == 2);
-				}
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation");
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint y;
-				for (y = 2; x < 10; ) {
-					y = 3;
-				}
-				assert(y == 3);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation");
-	text = R"(
-		contract C {
-			function f(uint x) public pure {
-				uint y;
-				for (y = 2; x < 10; ) {
-					y = 3;
-				}
-				assert(y == 2);
-			}
-		}
-	)";
-	CHECK_WARNING(text, "Assertion violation");
-}
-
 BOOST_AUTO_TEST_CASE(division)
 {
 	string text = R"(
diff --git a/test/libsolidity/smtCheckerTests/complex/warn_on_struct.sol b/test/libsolidity/smtCheckerTests/complex/warn_on_struct.sol
new file mode 100644
index 00000000..6d9afe7c
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/complex/warn_on_struct.sol
@@ -0,0 +1,14 @@
+pragma experimental SMTChecker;
+
+contract C {
+    struct A { uint a; uint b; }
+    function f() public pure returns (uint) {
+        A memory a = A({ a: 1, b: 2 });
+    }
+}
+// ----
+// Warning: (133-143): Unused local variable.
+// Warning: (133-143): Assertion checker does not yet support the type of this variable.
+// Warning: (146-163): Assertion checker does not yet implement this expression.
+// Warning: (146-163): Internal error: Expression undefined for SMT solver.
+// Warning: (146-163): Assertion checker does not yet implement this type.
diff --git a/test/libsolidity/smtCheckerTests/complex/warn_on_typecast.sol b/test/libsolidity/smtCheckerTests/complex/warn_on_typecast.sol
new file mode 100644
index 00000000..be785414
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/complex/warn_on_typecast.sol
@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+contract C {
+    function f() public pure returns (uint) {
+        return uint8(1);
+    }
+}
+// ----
+// Warning: (106-114): Assertion checker does not yet implement this expression.
diff --git a/test/libsolidity/smtCheckerTests/control_flow/assignment_in_declaration.sol b/test/libsolidity/smtCheckerTests/control_flow/assignment_in_declaration.sol
new file mode 100644
index 00000000..0c701672
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/assignment_in_declaration.sol
@@ -0,0 +1,4 @@
+pragma experimental SMTChecker;
+contract C {
+    function f() public pure { uint a = 2; assert(a == 2); }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_assert_condition_1.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_assert_condition_1.sol
new file mode 100644
index 00000000..64f6e012
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_assert_condition_1.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        if (x > 10) {
+            assert(x > 9);
+        }
+        else
+        {
+            assert(x < 11);
+        }
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_assert_condition_2.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_assert_condition_2.sol
new file mode 100644
index 00000000..e39ab844
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_assert_condition_2.sol
@@ -0,0 +1,16 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        if (x > 10) {
+            assert(x > 9);
+        }
+        else if (x > 2)
+        {
+            assert(x <= 10 && x > 2);
+        }
+        else
+        {
+           assert(0 <= x && x <= 2);
+        }
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_1.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_1.sol
new file mode 100644
index 00000000..f93e32e4
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_1.sol
@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+// Branch does not touch variable a
+contract C {
+    function f(uint x) public pure {
+        uint a = 3;
+        if (x > 10) {
+        }
+        assert(a == 3);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_2.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_2.sol
new file mode 100644
index 00000000..c00ef787
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_2.sol
@@ -0,0 +1,11 @@
+pragma experimental SMTChecker;
+// Positive branch touches variable a, but assertion should still hold.
+contract C {
+    function f(uint x) public pure {
+        uint a = 3;
+        if (x > 10) {
+            a = 3;
+        }
+        assert(a == 3);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_3.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_3.sol
new file mode 100644
index 00000000..4e18aa88
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_3.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+// Negative branch touches variable a, but assertion should still hold.
+contract C {
+    function f(uint x) public pure {
+        uint a = 3;
+        if (x > 10) {
+        } else {
+            a = 3;
+        }
+        assert(a == 3);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_4.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_4.sol
new file mode 100644
index 00000000..e3a02704
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_4.sol
@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+// Variable is not merged, if it is only read.
+contract C {
+    function f(uint x) public pure {
+        uint a = 3;
+        if (x > 10) {
+            assert(a == 3);
+        } else {
+            assert(a == 3);
+        }
+        assert(a == 3);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_5.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_5.sol
new file mode 100644
index 00000000..0bd1cf3a
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_5.sol
@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+// Variable is reset in both branches
+contract C {
+    function f(uint x) public pure {
+        uint a = 2;
+        if (x > 10) {
+            a = 3;
+        } else {
+            a = 3;
+        }
+        assert(a == 3);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_6.sol b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_6.sol
new file mode 100644
index 00000000..8e477179
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/branches_merge_variables_6.sol
@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+// Variable is reset in both branches
+contract C {
+    function f(uint x) public pure {
+        uint a = 2;
+        if (x > 10) {
+            a = 3;
+        } else {
+            a = 4;
+        }
+        assert(a >= 3);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_1.sol b/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_1.sol
new file mode 100644
index 00000000..16d6fdfe
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_1.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        uint a = 3;
+        if (x > 10) {
+            a++;
+        }
+        assert(a == 3);
+    }
+}
+// ----
+// Warning: (159-173): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_2.sol b/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_2.sol
new file mode 100644
index 00000000..e25ab20f
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_2.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        uint a = 3;
+        if (x > 10) {
+            ++a;
+        }
+        assert(a == 3);
+    }
+}
+// ----
+// Warning: (159-173): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_3.sol b/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_3.sol
new file mode 100644
index 00000000..03ae7216
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_3.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        uint a = 3;
+        if (x > 10) {
+            a = 5;
+        }
+        assert(a == 3);
+    }
+}
+// ----
+// Warning: (161-175): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/functions/function_call_does_not_clear_local_vars.sol b/test/libsolidity/smtCheckerTests/functions/function_call_does_not_clear_local_vars.sol
new file mode 100644
index 00000000..b4260224
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/functions/function_call_does_not_clear_local_vars.sol
@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+contract C {
+    function f() public {
+        uint a = 3;
+        this.f();
+        assert(a == 3);
+        f();
+        assert(a == 3);
+    }
+}
+// ----
+// Warning: (99-107): Assertion checker does not yet implement this type of function call.
+// Warning: (141-144): Assertion checker does not support recursive function calls.
diff --git a/test/libsolidity/smtCheckerTests/loops/for_loop_1.sol b/test/libsolidity/smtCheckerTests/loops/for_loop_1.sol
new file mode 100644
index 00000000..8988efad
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/for_loop_1.sol
@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        require(x == 2);
+        for (;;) {}
+        assert(x == 2);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/loops/for_loop_2.sol b/test/libsolidity/smtCheckerTests/loops/for_loop_2.sol
new file mode 100644
index 00000000..58c9f3a7
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/for_loop_2.sol
@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        for (; x == 2; ) {
+            assert(x == 2);
+        }
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/loops/for_loop_3.sol b/test/libsolidity/smtCheckerTests/loops/for_loop_3.sol
new file mode 100644
index 00000000..8bf9bdc7
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/for_loop_3.sol
@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        for (uint y = 2; x < 10; ) {
+            assert(y == 2);
+        }
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/loops/for_loop_4.sol b/test/libsolidity/smtCheckerTests/loops/for_loop_4.sol
new file mode 100644
index 00000000..4d082026
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/for_loop_4.sol
@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        for (uint y = 2; x < 10; y = 3) {
+            assert(y == 2);
+        }
+    }
+}
+// ----
+// Warning: (136-150): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/loops/for_loop_5.sol b/test/libsolidity/smtCheckerTests/loops/for_loop_5.sol
new file mode 100644
index 00000000..2c84960f
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/for_loop_5.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        uint y;
+        for (y = 2; x < 10; ) {
+            y = 3;
+        }
+        assert(y == 3);
+    }
+}
+// ----
+// Warning: (167-181): Assertion violation happens here\nNote that some information is erased after the execution of loops.\nYou can re-introduce information using require().
diff --git a/test/libsolidity/smtCheckerTests/loops/for_loop_6.sol b/test/libsolidity/smtCheckerTests/loops/for_loop_6.sol
new file mode 100644
index 00000000..90c4c328
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/for_loop_6.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        uint y;
+        for (y = 2; x < 10; ) {
+            y = 3;
+        }
+        assert(y == 2);
+    }
+}
+// ----
+// Warning: (167-181): Assertion violation happens here\nNote that some information is erased after the execution of loops.\nYou can re-introduce information using require().
diff --git a/test/libsolidity/smtCheckerTests/loops/while_loop_simple_1.sol b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_1.sol
new file mode 100644
index 00000000..074be86f
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_1.sol
@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+// Check that variables are cleared
+contract C {
+    function f(uint x) public pure {
+        x = 2;
+        while (x > 1) {
+            x = 2;
+        }
+        assert(x == 2);
+    }
+}
+// ----
+// Warning: (194-208): Assertion violation happens here\nNote that some information is erased after the execution of loops.\nYou can re-introduce information using require().
diff --git a/test/libsolidity/smtCheckerTests/loops/while_loop_simple_2.sol b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_2.sol
new file mode 100644
index 00000000..92a3f0fe
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_2.sol
@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+// Check that condition is assumed.
+contract C {
+    function f(uint x) public pure {
+        while (x == 2) {
+            assert(x == 2);
+        }
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/loops/while_loop_simple_3.sol b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_3.sol
new file mode 100644
index 00000000..a37df888
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_3.sol
@@ -0,0 +1,11 @@
+pragma experimental SMTChecker;
+// Check that condition is not assumed after the body anymore
+contract C {
+    function f(uint x) public pure {
+        while (x == 2) {
+        }
+        assert(x == 2);
+    }
+}
+// ----
+// Warning: (187-201): Assertion violation happens here\nNote that some information is erased after the execution of loops.\nYou can re-introduce information using require().
diff --git a/test/libsolidity/smtCheckerTests/loops/while_loop_simple_4.sol b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_4.sol
new file mode 100644
index 00000000..f71da865
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_4.sol
@@ -0,0 +1,11 @@
+pragma experimental SMTChecker;
+// Check that negation of condition is not assumed after the body anymore
+contract C {
+    function f(uint x) public pure {
+        while (x == 2) {
+        }
+        assert(x != 2);
+    }
+}
+// ----
+// Warning: (199-213): Assertion violation happens here\nNote that some information is erased after the execution of loops.\nYou can re-introduce information using require().
diff --git a/test/libsolidity/smtCheckerTests/loops/while_loop_simple_5.sol b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_5.sol
new file mode 100644
index 00000000..41559c99
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/loops/while_loop_simple_5.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+// Check that side-effects of condition are taken into account
+contract C {
+    function f(uint x, uint y) public pure {
+        x = 7;
+        while ((x = y) > 0) {
+        }
+        assert(x == 7);
+    }
+}
+// ----
+// Warning: (216-230): Assertion violation happens here\nNote that some information is erased after the execution of loops.\nYou can re-introduce information using require().
diff --git a/test/libsolidity/smtCheckerTests/overflow/simple_overflow.sol b/test/libsolidity/smtCheckerTests/overflow/simple_overflow.sol
new file mode 100644
index 00000000..894ff1a4
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/overflow/simple_overflow.sol
@@ -0,0 +1,6 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint a, uint b) public pure returns (uint) { return a + b; }
+}
+// ----
+// Warning: (112-117): Overflow (resulting value larger than 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) happens here
diff --git a/test/libsolidity/smtCheckerTests/simple/smoke_test.sol b/test/libsolidity/smtCheckerTests/simple/smoke_test.sol
new file mode 100644
index 00000000..8b7b77da
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/simple/smoke_test.sol
@@ -0,0 +1,3 @@
+pragma experimental SMTChecker;
+contract C {
+}
diff --git a/test/libsolidity/smtCheckerTests/types/bool_int_mixed_1.sol b/test/libsolidity/smtCheckerTests/types/bool_int_mixed_1.sol
new file mode 100644
index 00000000..d611cc17
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_int_mixed_1.sol
@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x) public pure {
+        uint a;
+        if(x)
+            a = 1;
+        assert(!x || a > 0);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/types/bool_int_mixed_2.sol b/test/libsolidity/smtCheckerTests/types/bool_int_mixed_2.sol
new file mode 100644
index 00000000..24640c5a
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_int_mixed_2.sol
@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x, uint a) public pure {
+        require(!x || a > 0);
+        uint b = a;
+        assert(!x || b > 0);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/types/bool_int_mixed_3.sol b/test/libsolidity/smtCheckerTests/types/bool_int_mixed_3.sol
new file mode 100644
index 00000000..f872e82f
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_int_mixed_3.sol
@@ -0,0 +1,21 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x, bool y) public pure {
+        uint a;
+        if (x) {
+            if (y) {
+                a = 0;
+            } else {
+                a = 1;
+            }
+        } else {
+            if (y) {
+                a = 1;
+            } else {
+                a = 0;
+            }
+        }
+        bool xor_x_y = (x && !y) || (!x && y);
+        assert(!xor_x_y || a > 0);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/types/bool_simple_1.sol b/test/libsolidity/smtCheckerTests/types/bool_simple_1.sol
new file mode 100644
index 00000000..76b4b08b
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_simple_1.sol
@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x) public pure {
+        assert(x);
+    }
+}
+// ----
+// Warning: (90-99): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/types/bool_simple_2.sol b/test/libsolidity/smtCheckerTests/types/bool_simple_2.sol
new file mode 100644
index 00000000..5c166c02
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_simple_2.sol
@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x, bool y) public pure {
+        assert(x == y);
+    }
+}
+// ----
+// Warning: (98-112): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/types/bool_simple_3.sol b/test/libsolidity/smtCheckerTests/types/bool_simple_3.sol
new file mode 100644
index 00000000..1d2ab49f
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_simple_3.sol
@@ -0,0 +1,7 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x, bool y) public pure {
+        bool z = x || y;
+        assert(!(x && y) || z);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/types/bool_simple_4.sol b/test/libsolidity/smtCheckerTests/types/bool_simple_4.sol
new file mode 100644
index 00000000..c40404a4
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_simple_4.sol
@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x) public pure {
+        if(x) {
+            assert(x);
+        } else {
+            assert(!x);
+        }
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/types/bool_simple_5.sol b/test/libsolidity/smtCheckerTests/types/bool_simple_5.sol
new file mode 100644
index 00000000..4cecebbc
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_simple_5.sol
@@ -0,0 +1,7 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x) public pure {
+        bool y = x;
+        assert(x == y);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/types/bool_simple_6.sol b/test/libsolidity/smtCheckerTests/types/bool_simple_6.sol
new file mode 100644
index 00000000..90350bb6
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/bool_simple_6.sol
@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(bool x) public pure {
+        require(x);
+        bool y;
+        y = false;
+        assert(x || y);
+    }
+}
diff --git a/test/libsolidity/smtCheckerTests/types/storage_value_vars_1.sol b/test/libsolidity/smtCheckerTests/types/storage_value_vars_1.sol
new file mode 100644
index 00000000..84f6c77e
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/storage_value_vars_1.sol
@@ -0,0 +1,22 @@
+pragma experimental SMTChecker;
+contract C
+{
+    address a;
+    bool b;
+    uint c;
+    function f(uint x) public {
+        if (x == 0)
+        {
+            a = 0x0000000000000000000000000000000000000100;
+            b = true;
+        }
+        else
+        {
+            a = 0x0000000000000000000000000000000000000200;
+            b = false;
+        }
+        assert(a > 0x0000000000000000000000000000000000000000 && b);
+    }
+}
+// ----
+// Warning: (362-421): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/types/storage_value_vars_2.sol b/test/libsolidity/smtCheckerTests/types/storage_value_vars_2.sol
new file mode 100644
index 00000000..bceddb38
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/storage_value_vars_2.sol
@@ -0,0 +1,12 @@
+pragma experimental SMTChecker;
+contract C
+{
+    address a;
+    bool b;
+    uint c;
+    function f() public view {
+        assert(c > 0);
+    }
+}
+// ----
+// Warning: (123-136): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/types/storage_value_vars_3.sol b/test/libsolidity/smtCheckerTests/types/storage_value_vars_3.sol
new file mode 100644
index 00000000..39049b99
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/storage_value_vars_3.sol
@@ -0,0 +1,25 @@
+pragma experimental SMTChecker;
+contract C
+{
+    function f(uint x) public {
+        if (x == 0)
+        {
+            a = 0x0000000000000000000000000000000000000100;
+            b = true;
+        }
+        else
+        {
+            a = 0x0000000000000000000000000000000000000200;
+            b = false;
+        }
+        assert(b == (a < 0x0000000000000000000000000000000000000200));
+    }
+
+    function g() public view {
+        require(a < 0x0000000000000000000000000000000000000100);
+        assert(c >= 0);
+    }
+    address a;
+    bool b;
+    uint c;
+}
diff --git a/test/libsolidity/smtCheckerTests/types/storage_value_vars_4.sol b/test/libsolidity/smtCheckerTests/types/storage_value_vars_4.sol
new file mode 100644
index 00000000..88b6b0ae
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/types/storage_value_vars_4.sol
@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+contract C
+{
+    function f() public view {
+        assert(c > 0);
+    }
+    uint c;
+}
+// ----
+// Warning: (84-97): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/verification_target/constant_condition_1.sol b/test/libsolidity/smtCheckerTests/verification_target/constant_condition_1.sol
new file mode 100644
index 00000000..b9fae4ee
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/verification_target/constant_condition_1.sol
@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        if (x >= 0) { revert(); }
+    }
+}
+// ----
+// Warning: (94-100): Condition is always true.
+// Warning: (104-112): Assertion checker does not yet implement this type of function call.
diff --git a/test/libsolidity/smtCheckerTests/verification_target/constant_condition_2.sol b/test/libsolidity/smtCheckerTests/verification_target/constant_condition_2.sol
new file mode 100644
index 00000000..aaa613ea
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/verification_target/constant_condition_2.sol
@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint x) public pure {
+        if (x >= 10) { if (x < 10) { revert(); } }
+    }
+}
+// ----
+// Warning: (109-115): Condition is always false.
+// Warning: (119-127): Assertion checker does not yet implement this type of function call.
diff --git a/test/libsolidity/smtCheckerTests/verification_target/constant_condition_3.sol b/test/libsolidity/smtCheckerTests/verification_target/constant_condition_3.sol
new file mode 100644
index 00000000..f22cd65e
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/verification_target/constant_condition_3.sol
@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+// a plain literal constant is fine
+contract C {
+    function f(uint) public pure {
+        if (true) { revert(); }
+    }
+}
+// ----
+// Warning: (136-144): Assertion checker does not yet implement this type of function call.
diff --git a/test/libsolidity/smtCheckerTests/verification_target/simple_assert.sol b/test/libsolidity/smtCheckerTests/verification_target/simple_assert.sol
new file mode 100644
index 00000000..8bd6e61a
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/verification_target/simple_assert.sol
@@ -0,0 +1,6 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint a) public pure { assert(a == 2); }
+}
+// ----
+// Warning: (82-96): Assertion violation happens here
diff --git a/test/libsolidity/smtCheckerTests/verification_target/simple_assert_with_require.sol b/test/libsolidity/smtCheckerTests/verification_target/simple_assert_with_require.sol
new file mode 100644
index 00000000..b66ae245
--- /dev/null
+++ b/test/libsolidity/smtCheckerTests/verification_target/simple_assert_with_require.sol
@@ -0,0 +1,4 @@
+pragma experimental SMTChecker;
+contract C {
+    function f(uint a) public pure { require(a < 10); assert(a < 20); }
+}