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Z3 seq solver segfaults on a large test formula with long strings #4894

@muchang

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@muchang
[521] % z3release smt.string_solver=z3str3 z3seq-long-strings-segfault.smt2 
unsat
[522] % cvc4 -q z3seq-long-strings-segfault.smt2 
unsat
[523] % 
[523] % z3release small.smt2
Segmentation fault
[524] %

Here is the file:
z3seq-long-strings-segfault.smt2.zip

Commit: 7fe8298

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