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			23 lines
		
	
	
		
			453 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			23 lines
		
	
	
		
			453 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
| abstract contract D
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| {
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| 	function g(uint x) public virtual;
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| }
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| 
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| contract C
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| {
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| 	uint x;
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| 	function f(uint y, D d) public {
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| 		require(x == y);
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| 		assert(x == y);
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| 		d.g(y);
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| 		// Storage knowledge is cleared after an external call.
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| 		assert(x == y);
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| 	}
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| }
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| // ====
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| // SMTEngine: all
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| // SMTIgnoreInv: yes
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| // SMTIgnoreOS: macos
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| // ----
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| // Info 1391: CHC: 2 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.
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