FAILURE MAP
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FA-68936 / Tide and marine navigation tables / Open access

Secondary port differences: Height difference interpolates from the spring value · case 01

Heights are corrected with the neap difference on spring days.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The height interpolation starts from the spring difference and moves toward neap as k grows.

VERIFIED REPAIR

Start from the neap difference and move toward spring with k.

Unsuccessful approach: Averaging the two differences ignores the day range.

Case contract

Input dict: standard port HW time hw (minutes of day), height hh, today range rng, mean spring/neap ranges sr/nr, time differences ts/tn (spring/neap, minutes) and height differences hs/hn. Interpolation factor k=(rng-nr)/(sr-nr) clamped to [0,1]; difference = neap+(spring-neap)*k. Time is wrapped to [0,1440) and rounded to whole minutes half up; height rounded to 2 decimals. Return [minutes, height].

Why this case matters

Tide tables and passage plans turn published predictions into go/no-go decisions about depth, clearance and timing.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(x):
    k=(x['rng']-x['nr'])/(x['sr']-x['nr'])
    k=max(0.0,min(1.0,k))
    dt=x['tn']+(x['ts']-x['tn'])*k
    dh=x['hs']+(x['hn']-x['hs'])*k
    t=math.floor(x['hw']+dt+0.5)
    t=t%1440
    return [t,round(x['hh']+dh,2)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 1.8, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [620, 3.9]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.4, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [606, 3.8]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [593, 3.7]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [593, 3.7]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5]), ('secondary port differences {"hw": 10, "hh": 3.8, "rng": 3.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 10, 'hh': 3.8, 'rng': 3.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1422, 3.25]), ('secondary port differences {"hw": 1430, "hh": 4.4, "rng": 2.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1430, 'hh': 4.4, 'rng': 2.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 4.17])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.4, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [606, 3.8]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5]), ('secondary port differences {"hw": 10, "hh": 3.8, "rng": 3.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 10, 'hh': 3.8, 'rng': 3.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1422, 3.25]), ('secondary port differences {"hw": 1430, "hh": 4.4, "rng": 2.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1430, 'hh': 4.4, 'rng': 2.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 4.17]), ('secondary port differences {"hw": 20, "hh": 3.0, "rng": 1.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 20, 'hh': 3.0, 'rng': 1.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [40, 2.8]), ('secondary port differences {"hw": 700, "hh": 5.0, "rng": 5.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 700, 'hh': 5.0, 'rng': 5.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [665, 4.4]), ('secondary port differences {"hw": 1425, "hh": 4.0, "rng": 1.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1425, 'hh': 4.0, 'rng': 1.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 3.8])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 20, "hh": 3.0, "rng": 1.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 20, 'hh': 3.0, 'rng': 1.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [40, 2.8]), ('secondary port differences {"hw": 700, "hh": 5.0, "rng": 5.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 700, 'hh': 5.0, 'rng': 5.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [665, 4.4]), ('secondary port differences {"hw": 1425, "hh": 4.0, "rng": 1.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1425, 'hh': 4.0, 'rng': 1.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 3.8]), ('secondary port differences {"hw": 30, "hh": 4.9, "rng": 4.7, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 30, 'hh': 4.9, 'rng': 4.7, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1435, 4.3]), ('secondary port differences {"hw": 300, "hh": 2.2, "rng": 0.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 300, 'hh': 2.2, 'rng': 0.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [320, 2.0]), ('secondary port differences {"hw": 600, "hh": 4.0, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -35, "tn": 20, "hs": -0.5, "hn": -0.1}', {'hw': 600, 'hh': 4.0, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -35, 'tn': 20, 'hs': -0.5, 'hn': -0.1}, [593, 3.7])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 30, "hh": 4.9, "rng": 4.7, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 30, 'hh': 4.9, 'rng': 4.7, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1435, 4.3]), ('secondary port differences {"hw": 300, "hh": 2.2, "rng": 0.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 300, 'hh': 2.2, 'rng': 0.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [320, 2.0]), ('secondary port differences {"hw": 600, "hh": 4.0, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -35, "tn": 20, "hs": -0.5, "hn": -0.1}', {'hw': 600, 'hh': 4.0, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -35, 'tn': 20, 'hs': -0.5, 'hn': -0.1}, [593, 3.7]), ('secondary port differences {"hw": 610, "hh": 3.5, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -12, "tn": 25, "hs": -0.4, "hn": 0.1}', {'hw': 610, 'hh': 3.5, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -12, 'tn': 25, 'hs': -0.4, 'hn': 0.1}, [617, 3.35]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 1.8, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [620, 3.9]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[620, 3.5][620, 3.9]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[611, 3.57][611, 3.83]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[606, 3.6][606, 3.8]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[593, 3.7][593, 3.7]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[590, 3.72][590, 3.68]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[579, 3.8][579, 3.6]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[565, 3.9][565, 3.5]Failed

SHA-256 / 30ca4d4f9ec2e10e78f9bbeb9d2b104dab671c23d3cefa63f7db013a28f7a852

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(x):
    k=(x['rng']-x['nr'])/(x['sr']-x['nr'])
    k=max(0.0,min(1.0,k))
    dt=x['tn']+(x['ts']-x['tn'])*k
    dh=(x['hn']+x['hs'])/2
    t=math.floor(x['hw']+dt+0.5)
    t=t%1440
    return [t,round(x['hh']+dh,2)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 1.8, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [620, 3.9]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.4, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [606, 3.8]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [593, 3.7]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [593, 3.7]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5]), ('secondary port differences {"hw": 10, "hh": 3.8, "rng": 3.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 10, 'hh': 3.8, 'rng': 3.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1422, 3.25]), ('secondary port differences {"hw": 1430, "hh": 4.4, "rng": 2.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1430, 'hh': 4.4, 'rng': 2.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 4.17])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.4, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [606, 3.8]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5]), ('secondary port differences {"hw": 10, "hh": 3.8, "rng": 3.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 10, 'hh': 3.8, 'rng': 3.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1422, 3.25]), ('secondary port differences {"hw": 1430, "hh": 4.4, "rng": 2.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1430, 'hh': 4.4, 'rng': 2.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 4.17]), ('secondary port differences {"hw": 20, "hh": 3.0, "rng": 1.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 20, 'hh': 3.0, 'rng': 1.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [40, 2.8]), ('secondary port differences {"hw": 700, "hh": 5.0, "rng": 5.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 700, 'hh': 5.0, 'rng': 5.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [665, 4.4]), ('secondary port differences {"hw": 1425, "hh": 4.0, "rng": 1.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1425, 'hh': 4.0, 'rng': 1.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 3.8])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 20, "hh": 3.0, "rng": 1.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 20, 'hh': 3.0, 'rng': 1.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [40, 2.8]), ('secondary port differences {"hw": 700, "hh": 5.0, "rng": 5.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 700, 'hh': 5.0, 'rng': 5.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [665, 4.4]), ('secondary port differences {"hw": 1425, "hh": 4.0, "rng": 1.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1425, 'hh': 4.0, 'rng': 1.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 3.8]), ('secondary port differences {"hw": 30, "hh": 4.9, "rng": 4.7, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 30, 'hh': 4.9, 'rng': 4.7, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1435, 4.3]), ('secondary port differences {"hw": 300, "hh": 2.2, "rng": 0.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 300, 'hh': 2.2, 'rng': 0.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [320, 2.0]), ('secondary port differences {"hw": 600, "hh": 4.0, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -35, "tn": 20, "hs": -0.5, "hn": -0.1}', {'hw': 600, 'hh': 4.0, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -35, 'tn': 20, 'hs': -0.5, 'hn': -0.1}, [593, 3.7])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 30, "hh": 4.9, "rng": 4.7, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 30, 'hh': 4.9, 'rng': 4.7, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1435, 4.3]), ('secondary port differences {"hw": 300, "hh": 2.2, "rng": 0.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 300, 'hh': 2.2, 'rng': 0.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [320, 2.0]), ('secondary port differences {"hw": 600, "hh": 4.0, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -35, "tn": 20, "hs": -0.5, "hn": -0.1}', {'hw': 600, 'hh': 4.0, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -35, 'tn': 20, 'hs': -0.5, 'hn': -0.1}, [593, 3.7]), ('secondary port differences {"hw": 610, "hh": 3.5, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -12, "tn": 25, "hs": -0.4, "hn": 0.1}', {'hw': 610, 'hh': 3.5, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -12, 'tn': 25, 'hs': -0.4, 'hn': 0.1}, [617, 3.35]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 1.8, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [620, 3.9]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[620, 3.7][620, 3.9]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[611, 3.7][611, 3.83]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[606, 3.7][606, 3.8]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[593, 3.7][593, 3.7]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[590, 3.7][590, 3.68]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[579, 3.7][579, 3.6]Failed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[565, 3.7][565, 3.5]Failed

SHA-256 / a344e54268362ba1f4a27edcfd5265527c5b0d610bc17c99b29db25013b97b27

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(x):
    k=(x['rng']-x['nr'])/(x['sr']-x['nr'])
    k=max(0.0,min(1.0,k))
    dt=x['tn']+(x['ts']-x['tn'])*k
    dh=x['hn']+(x['hs']-x['hn'])*k
    t=math.floor(x['hw']+dt+0.5)
    t=t%1440
    return [t,round(x['hh']+dh,2)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 1.8, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [620, 3.9]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.4, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [606, 3.8]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [593, 3.7]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [593, 3.7]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5]), ('secondary port differences {"hw": 10, "hh": 3.8, "rng": 3.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 10, 'hh': 3.8, 'rng': 3.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1422, 3.25]), ('secondary port differences {"hw": 1430, "hh": 4.4, "rng": 2.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1430, 'hh': 4.4, 'rng': 2.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 4.17])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.4, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [606, 3.8]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 4.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [565, 3.5]), ('secondary port differences {"hw": 10, "hh": 3.8, "rng": 3.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 10, 'hh': 3.8, 'rng': 3.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1422, 3.25]), ('secondary port differences {"hw": 1430, "hh": 4.4, "rng": 2.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1430, 'hh': 4.4, 'rng': 2.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 4.17]), ('secondary port differences {"hw": 20, "hh": 3.0, "rng": 1.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 20, 'hh': 3.0, 'rng': 1.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [40, 2.8]), ('secondary port differences {"hw": 700, "hh": 5.0, "rng": 5.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 700, 'hh': 5.0, 'rng': 5.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [665, 4.4]), ('secondary port differences {"hw": 1425, "hh": 4.0, "rng": 1.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1425, 'hh': 4.0, 'rng': 1.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 3.8])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.1, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [590, 3.68]), ('secondary port differences {"hw": 20, "hh": 3.0, "rng": 1.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 20, 'hh': 3.0, 'rng': 1.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [40, 2.8]), ('secondary port differences {"hw": 700, "hh": 5.0, "rng": 5.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 700, 'hh': 5.0, 'rng': 5.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [665, 4.4]), ('secondary port differences {"hw": 1425, "hh": 4.0, "rng": 1.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 1425, 'hh': 4.0, 'rng': 1.0, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [5, 3.8]), ('secondary port differences {"hw": 30, "hh": 4.9, "rng": 4.7, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 30, 'hh': 4.9, 'rng': 4.7, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1435, 4.3]), ('secondary port differences {"hw": 300, "hh": 2.2, "rng": 0.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 300, 'hh': 2.2, 'rng': 0.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [320, 2.0]), ('secondary port differences {"hw": 600, "hh": 4.0, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -35, "tn": 20, "hs": -0.5, "hn": -0.1}', {'hw': 600, 'hh': 4.0, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -35, 'tn': 20, 'hs': -0.5, 'hn': -0.1}, [593, 3.7])], [('secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 3.6, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [579, 3.6]), ('secondary port differences {"hw": 30, "hh": 4.9, "rng": 4.7, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 30, 'hh': 4.9, 'rng': 4.7, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [1435, 4.3]), ('secondary port differences {"hw": 300, "hh": 2.2, "rng": 0.9, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 300, 'hh': 2.2, 'rng': 0.9, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [320, 2.0]), ('secondary port differences {"hw": 600, "hh": 4.0, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -35, "tn": 20, "hs": -0.5, "hn": -0.1}', {'hw': 600, 'hh': 4.0, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -35, 'tn': 20, 'hs': -0.5, 'hn': -0.1}, [593, 3.7]), ('secondary port differences {"hw": 610, "hh": 3.5, "rng": 3.0, "sr": 4.0, "nr": 2.0, "ts": -12, "tn": 25, "hs": -0.4, "hn": 0.1}', {'hw': 610, 'hh': 3.5, 'rng': 3.0, 'sr': 4.0, 'nr': 2.0, 'ts': -12, 'tn': 25, 'hs': -0.4, 'hn': 0.1}, [617, 3.35]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 1.8, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [620, 3.9]), ('secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}', {'hw': 600, 'hh': 4.1, 'rng': 2.2, 'sr': 4.2, 'nr': 1.8, 'ts': -35, 'tn': 20, 'hs': -0.6, 'hn': -0.2}, [611, 3.83])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
secondary port differences {"hw": 600, "hh": 4.1, "rng": 1.8, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[620, 3.9][620, 3.9]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[611, 3.83][611, 3.83]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 2.4, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[606, 3.8][606, 3.8]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.0, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[593, 3.7][593, 3.7]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.1, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[590, 3.68][590, 3.68]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 3.6, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[579, 3.6][579, 3.6]Passed
secondary port differences {"hw": 600, "hh": 4.1, "rng": 4.2, "sr": 4.2, "nr": 1.8, "ts": -35, "tn": 20, "hs": -0.6, "hn": -0.2}[565, 3.5][565, 3.5]Passed

SHA-256 / db9c626e73f33c5f44d9d39b13a945b0f8aa6a13ca71bdf053e7c18bae6edffd

Verification & scope

A deterministic toy model with stipulated rules and constants; not certified hydrographic software or a substitute for official tide tables. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:48:06.813810+00:00.

Case digest / 9d9eb5bc788eecdf8e8d507e26b1b1e93c1eb3387b06eb43434bd36dec2f38cc