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Merge pull request #10202 from ethereum/smt_fix_modifiers_branches

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[SMTChecker] Fix CHC false positives when using branches inside modifiers
This commit is contained in:
Leonardo
2020-11-09 16:42:30 +00:00
committed by GitHub
parent 32f1d25498 1dbd8f8d67
commit 25b2a38d8b
10 changed files with 145 additions and 8 deletions
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test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_1.sol
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@@ -0,0 +1,24 @@
pragma experimental SMTChecker;
contract C {
uint x;
modifier m(uint z) {
uint y = 3;
if (z == 10)
x = 2 + y;
_;
if (z == 10)
x = 4 + y;
}
function f() m(10) internal {
x = 3;
}
function g() public {
x = 0;
f();
assert(x == 7);
// Fails
assert(x == 6);
}
}
// ----
// Warning 6328: (359-373): CHC: Assertion violation happens here.
test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_2.sol
+24
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@@ -0,0 +1,24 @@
pragma experimental SMTChecker;
contract C {
uint x;
modifier m(uint z) {
uint y = 3;
if (z == 10)
x = 2 + y;
_;
if (z == 10)
x = 4 + y;
}
function f() m(10) m(12) internal {
x = 3;
}
function g() public {
x = 0;
f();
assert(x == 3);
// Fails
assert(x == 6);
}
}
// ----
// Warning 6328: (365-379): CHC: Assertion violation happens here.
test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_3.sol
+24
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@@ -0,0 +1,24 @@
pragma experimental SMTChecker;
contract C {
uint x;
modifier m(uint z) {
uint y = 3;
if (z == 10)
x = 2 + y;
_;
if (z == 10)
x = 4 + y;
}
function f() m(8) internal {
x = 3;
}
function g() public {
x = 0;
f();
assert(x == 3);
// Fails
assert(x == 6);
}
}
// ----
// Warning 6328: (358-372): CHC: Assertion violation happens here.
test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_4.sol
+24
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@@ -0,0 +1,24 @@
pragma experimental SMTChecker;
contract C {
uint x;
modifier m(uint z) {
uint y = 3;
if (z >= 10)
x = 2 + y;
_;
if (z >= 10)
x = 4 + y;
}
function f() m(10) m(12) internal {
x = 3;
}
function g() public {
x = 0;
f();
assert(x == 7);
// Fails
assert(x == 6);
}
}
// ----
// Warning 6328: (365-379): CHC: Assertion violation happens here.