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Theorem add4

aubifs_core_journal_add4#(ND1, ND2, ND3, ND4, RI, FI, RO, FO; ADR1, ADR2, ADR3, ADR4, FS, LOG; CSYNCED, ERR) {if ri-cons(RI, FS) ∧ node-cons(ND1.key, ND1) ∧ node-cons(ND2.key, ND2) ∧ node-cons(ND3.key, ND3) ∧ node-cons(ND4.key, ND4) then { choose adr1, adr2, adr3, adr4 with new(adr1 ' + adr2 ' + (adr3 ' + adr4), FS) ∧ ¬ dups(adr1 ' + adr2 ' + adr3 ' + adr4 ') in {ADR1 := adr1, ADR2 := adr2, ADR3 := adr3, ADR4 := adr4; FS := FS[ADR1, ND1][ADR2, ND2][ADR3, ND3][ADR4, ND4], LOG := (((LOG + ADR1) + ADR2) + ADR3) + ADR4, ERR := ESUCCESS} ifnone ERR := ENOSPC or {fail#(; ; ERR); ADR1 := ?, ADR2 := ?, ADR3 := ?, ADR4 := ?}; CSYNCED := ?} else abort }