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			17 lines
		
	
	
		
			270 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			17 lines
		
	
	
		
			270 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
| contract C {
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| 	bool lock = true;
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| 	function f() public {
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| 		lock = false;
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| 		g();
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| 		lock = true;
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| 	}
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| 	function g() public payable {
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| 		require(lock == false);
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| 		assert(msg.value == 0);
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| 	}
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| }
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| // ====
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| // SMTEngine: all
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| // ----
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| // Info 1180: Contract invariant(s) for :C:\nlock\n
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