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				https://github.com/ethereum/solidity
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			28 lines
		
	
	
		
			873 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			28 lines
		
	
	
		
			873 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
pragma experimental SMTChecker;
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abstract contract D {
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    function d() public virtual ;
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}
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contract C {
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    bool a;
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    uint x;
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    D d;
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    function g() public returns (uint) {
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        x = 2;
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        d.d();
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        return x;
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    }
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    function f() public {
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        x = 1;
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        uint y = g();
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        assert(x == 2 || x == 1);
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    }
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    function h() public {
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        x = 3;
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    }
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}
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// ----
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// Warning 2072: (282-288): Unused local variable.
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// Warning 6328: (304-328): CHC: Assertion violation happens here.\nCounterexample:\na = false, x = 3, d = 0\n = 0\n\nTransaction trace:\nC.constructor()\nState: a = false, x = 0, d = 0\nC.g()\n    d.d() -- untrusted external call, synthesized as:\n        C.f() -- reentrant call\n            C.g() -- internal call\n                d.d() -- untrusted external call, synthesized as:\n                    C.h() -- reentrant call
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