Initialize m_max_generation to 0

[CanCebeci]

The current implementation is sensitive to which enode within the eclass gets passed as a candidate to the mam. If the candidate has a high generation, mam will overshoot max_generation,

Below are the effects on Mariposa. This eliminates unknowns form almost all queries. In terms of additional timeouts, only d_komodo-verified-sha-sha256.i.dfyImpl___module.__default.lemma__SHA256FinalHelper1.smt2 seems to suffer significantly.

'Before' refers to existing measurements from the previous generation patch (#9628), NOT the commit this patch is based on.

Query	Unsats before	Unknowns before	Timeouts before	Unsats after	Unknowns after	Timeouts after	Delta Unsat	Delta Unknown	Delta Timeout
d_fvbkv-Betree-BetreeInv.i.dfy.Impl__BetreeInv.__default.FlushPreservesLookups.smt2	99	0	1	98	0	2	-1	0	+1
d_fvbkv-ByteBlockCacheSystem-ByteSystem.i.dfy.Impl__ByteSystem.__default.ReqWrite2StepPreservesInv.smt2	44	0	56	43	0	57	-1	0	+1
d_fvbkv-ByteBlockCacheSystem-InterpretationDisk.i.dfy.Impl__InterpretationDisk.__default.RefinesProcessWrite.smt2	99	1	0	100	0	0	+1	-1	0
d_fvbkv-Impl-FlushPolicyImpl.i.dfy.Impl__FlushPolicyImpl.__default.runFlushPolicy.smt2	6	0	94	8	0	92	+2	0	-2
d_fvbkv-Impl-IOImpl.i.dfy.Impl__IOImpl.__default.PageInNodeResp.smt2	81	0	19	87	0	13	+6	0	-6
d_fvbkv-Impl-JournalistModel.i.dfy.CheckWellformed__JournalistModel.__default.append.smt2	99	1	0	100	0	0	+1	-1	0
d_fvbkv-Impl-QueryImpl.i.dfy.Impl__QueryImpl.__default.queryIterate.smt2	43	0	57	47	0	53	+4	0	-4
d_fvbkv-lib-Base-BitsetLemmas.i.dfy.Impl__BitsetLemmas.__default.set__bit__to__0__self__uint64.smt2	100	0	0	100	0	0	0	0	0
d_fvbkv-lib-Base-BitsetLemmas.i.dfy.Impl__BitsetLemmas.__default.set__bit__to__1__self__uint64.smt2	100	0	0	100	0	0	0	0	0
d_fvbkv-lib-Buckets-KMBPKVOps.i.dfy.Impl__KMBPKVOps.__default.IndexFillDpkv.smt2	41	0	59	38	0	62	-3	0	+3
d_fvbkv-lib-Buckets-PackedKV.i.dfy.Impl__PackedKV.__default.BinarySearchQuery.smt2	92	1	7	87	0	13	-5	-1	+6
d_fvbkv-lib-Buckets-PackedStringArray.i.dfy.Impl__PackedStringArray.__default.UniqueRepr.smt2	100	0	0	100	0	0	0	0	0
d_fvbkv-lib-Buckets-PackedStringArray.i.dfy.Impl__PackedStringArray.__default.WFpsaSubSeq.smt2	82	0	18	92	0	8	+10	0	-10
d_fvbkv-lib-DataStructures-BtreeModel.i.dfy.Impl__BtreeModel.__default.SplitIndexAllKeys.smt2	9	0	91	6	0	94	-3	0	+3
d_fvbkv-lib-DataStructures-LruImpl.i.dfy.Impl__LruImpl.LruImplQueue.Use.smt2	97	0	3	97	0	3	0	0	0
d_fvbkv-lib-DataStructures-MutableBtree.i.dfy.Impl__MutableBtree.__default.SubIndex.smt2	50	2	48	58	0	42	+8	-2	-6
d_fvbkv-lib-DataStructures-MutableBtree.i.dfy.Impl__MutableBtree.__default.SubReprLowerBound.smt2	98	2	0	100	0	0	+2	-2	0
d_fvbkv-lib-Marshalling-GenericMarshalling.i.dfy.Impl__GenericMarshalling.__default.MarshallArray.smt2	76	24	0	100	0	0	+24	-24	0
d_fvbkv-lib-Marshalling-GenericMarshalling.i.dfy.Impl__GenericMarshalling.__default.MarshallUint32Array.smt2	96	3	1	100	0	0	+4	-3	-1
d_fvbkv-lib-Marshalling-GenericMarshalling.i.dfy.Impl__GenericMarshalling.__default.MarshallUint64Array.smt2	95	5	0	100	0	0	+5	-5	0
d_fvbkv-lib-Marshalling-Math.i.dfy.Impl__Math.__default.lemma__2toX.smt2	100	0	0	100	0	0	0	0	0
d_fvbkv-lib-Marshalling-Math.i.dfy.Impl__Math.__default.lemma__div__denominator.smt2	99	0	1	90	0	10	-9	0	+9
d_fvbkv-lib-Math-mod_auto_proofs.i.dfy.Impl__Math____mod__auto__proofs__i.__default.lemma__mod__induction__forall2.smt2	67	0	33	67	0	33	0	0	0
d_fvbkv-lib-Math-mod_auto_proofs.i.dfy.Impl__Math____mod__auto__proofs__i.__default.lemma__mod__induction__forall.smt2	0	0	100	0	0	100	0	0	0
d_fvbkv-lib-Math-mul.i.dfy.Impl__Math____mul__i.__default.lemma__mul__nonnegative.smt2	0	0	100	0	0	100	0	0	0
d_komodo-verified-ptebits.i.dfyImpl___module.__default.lemma__l1ptesmatch.smt2	68	0	32	60	0	40	-8	0	+8
d_komodo-verified-secprop-conf_ni.i.dfyImpl___module.__default.lemma__initL2PTable__loweq__pdb.smt2	85	0	15	84	0	16	-1	0	+1
d_komodo-verified-sha-sha256-body-00-15.gen.dfyImpl___module.__default.va__refined__Body__00__15UnrolledRecursive.smt2	0	0	100	0	0	100	0	0	0
d_komodo-verified-sha-sha256-body-16-xx.gen.dfyImpl___module.__default.va__refined__Body__16__XXUnroller.smt2	9	0	91	5	0	95	-4	0	+4
d_komodo-verified-sha-sha256.i.dfyImpl___module.__default.lemma__SHA256FinalHelper1.smt2	95	1	4	5	0	95	-90	-1	+91
d_komodo-verified-verify.gen.dfyImpl___module.__default.va__lemma__svc__returning__verify__inner_k.smt2	6	0	94	11	0	89	+5	0	-5
d_komodo-verified-verify.gen.dfyImpl___module.__default.va__lemma__svc__returning__verify__inner.smt2	61	0	39	75	0	25	+14	0	-14
d_komodo-verified-verify.gen.dfyImpl___module.__default.va__lemma__svc__returning__verify.smt2	78	0	22	78	0	22	0	0	0
d_lvbkv-Impl-BucketGeneratorModel.i.dfy.Impl__BucketGeneratorModel.__default.GenComposeIsCompose.smt2	53	0	47	50	0	50	-3	0	+3
d_lvbkv-Impl-JournalistImpl.i.dfy.Impl__JournalistImpl.Journalist.append.smt2	96	0	4	98	0	2	+2	0	-2
d_lvbkv-Impl-MarshallingImpl.i.dfy.Impl__MarshallingImpl.__default.strictlySortedPivotsToVal.smt2	0	0	100	20	0	80	+20	0	-20
d_lvbkv-lib-Base-total_order_impl.i.dfy.Impl__Total__Order__Impl.__default.ArrayLargestLtePlus1Linear.smt2	99	1	0	100	0	0	+1	-1	0
d_lvbkv-lib-Buckets-BucketsLib.i.dfy.Impl__BucketsLib.__default.WFProperSplitBucketInList.smt2	40	15	45	58	0	42	+18	-15	-3
d_lvbkv-lib-Buckets-PackedKV.i.dfy.Impl__DynamicPkv.DynamicPkv.Append.smt2	80	0	20	79	0	21	-1	0	+1
d_lvbkv-lib-Buckets-PackedKV.i.dfy.Impl__PackedKV.__default.BinarySearchQuery.smt2	11	0	89	14	0	86	+3	0	-3
d_lvbkv-lib-Buckets-PackedStringArray.i.dfy.Impl__PackedStringArray.__default.psaCanAppendI.smt2	70	0	30	53	0	47	-17	0	+17
d_lvbkv-lib-Buckets-PackedStringArray.i.dfy.Impl__PackedStringArray.DynamicPsa.AppendSeq.smt2	4	0	96	1	0	99	-3	0	+3
d_lvbkv-lib-Checksums-BitLemmas.i.dfy.Impl__BitLemmas.__default.eq__from__unpack__LittleEndian__Uint32__eq.smt2	99	0	1	99	0	1	0	0	0
d_lvbkv-lib-DataStructures-LinearContentMutableMap.i.dfy.Impl__LinearContentMutableMap.__default.Realloc.smt2	0	0	100	1	0	99	+1	0	-1
d_lvbkv-lib-DataStructures-LinearDList.i.dfy.Impl__DList.DList.InsertAfter.smt2	0	0	100	0	2	98	0	+2	-2
d_lvbkv-lib-DataStructures-LinearDList.i.dfy.Impl__DList.DList.InsertBefore.smt2	0	1	99	0	2	98	0	+1	-1
d_lvbkv-lib-DataStructures-MutableBtree.i.dfy.Impl__LMutableBtree.__default.InsertIndex.smt2	83	0	17	80	0	20	-3	0	+3
d_lvbkv-lib-Lang-LinearSequence.i.dfy.Impl__LinearSequence__i.__default.AllocAndMoveLseq.smt2	100	0	0	100	0	0	0	0	0
d_lvbkv-lib-Marshalling-GenericMarshalling.i.dfy.Impl__GenericMarshalling.__default.MarshallArray.smt2	77	23	0	100	0	0	+23	-23	0
d_lvbkv-lib-Marshalling-GenericMarshalling.i.dfy.Impl__GenericMarshalling.__default.MarshallByteArrayInterior.smt2	100	0	0	100	0	0	0	0	0
d_lvbkv-lib-Marshalling-GenericMarshalling.i.dfy.Impl__GenericMarshalling.__default.MarshallByteArray.smt2	98	2	0	99	1	0	+1	-1	0
d_lvbkv-lib-Math-Nonlinear.i.dfy.Impl__NonlinearLemmas.__default.div__denom__ge__1.smt2	97	3	0	97	3	0	0	0	0
d_lvbkv-MapSpec-TSJMap_Refines_ThreeStateVersionedMap.i.dfy.Impl__TSJMap__Refines__ThreeStateVersionedMap.__default.RefinesReplay.smt2	66	0	34	74	0	26	+8	0	-8
d_lvbkv-PivotBetree-PivotBetreeSpecRefinement.i.dfy.Impl__PivotBetreeSpecRefinement.__default.SplitChildrenConsistent.smt2	28	0	72	42	0	58	+14	0	-14
d_lvbkv-PivotBetree-PivotBetreeSpecWFNodes.i.dfy.Impl__PivotBetreeSpecWFNodes.__default.ValidSplitWritesInvNodes.smt2	99	0	1	100	0	0	+1	0	-1
fs_dice-queries-ASN1.Low.Base-3.smt2	1	32	0	1	31	1	0	-1	+1
fs_dice-queries-L0.X509.AliasKeyTBS.Issuer-7.smt2	33	0	0	20	0	13	-13	0	+13
fs_dice-queries-L0.X509.AliasKeyTBS.Subject-7.smt2	33	0	0	22	0	11	-11	0	+11